diff --git a/README.md b/README.md
index 49e57996..2d061540 100644
--- a/README.md
+++ b/README.md
@@ -596,47 +596,6 @@ final class SomeClass
 
 <br>
 
-### NoSingleInterfaceImplementerRule
-
-Interface "%s" has only single implementer. Consider using the class directly as there is no point in using the interface.
-
-```yaml
-rules:
-    - Symplify\PHPStanRules\Rules\NoSingleInterfaceImplementerRule
-```
-
-```php
-class SomeClass implements SomeInterface
-{
-}
-
-interface SomeInterface
-{
-}
-```
-
-:x:
-
-<br>
-
-```php
-class SomeClass implements SomeInterface
-{
-}
-
-class AnotherClass implements SomeInterface
-{
-}
-
-interface SomeInterface
-{
-}
-```
-
-:+1:
-
-<br>
-
 ### NoTestMocksRule
 
 Mocking "%s" class is forbidden. Use direct/anonymous class instead for better static analysis
diff --git a/config/code-complexity-rules.neon b/config/code-complexity-rules.neon
index 7809585e..2ae1382d 100644
--- a/config/code-complexity-rules.neon
+++ b/config/code-complexity-rules.neon
@@ -1,19 +1,2 @@
 rules:
     - Symplify\PHPStanRules\Rules\NoDynamicNameRule
-    - Symplify\PHPStanRules\Rules\NoSingleInterfaceImplementerRule
-
-services:
-    -
-        class: Symplify\PHPStanRules\Collector\InterfaceCollector
-        tags:
-            - phpstan.collector
-
-    -
-        class: Symplify\PHPStanRules\Collector\ImplementedInterfaceCollector
-        tags:
-            - phpstan.collector
-
-    -
-        class: Symplify\PHPStanRules\Collector\InterfaceOfAbstractClassCollector
-        tags:
-            - phpstan.collector
diff --git a/phpstan.neon b/phpstan.neon
index c04302c2..d5c790e2 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -33,9 +33,6 @@ parameters:
         # part of public contract
         - '#Method Symplify\\PHPStanRules\\Tests\\Rules\\(.*?)\\(.*?)Test\:\:testRule\(\) has parameter \$(expectedError(.*?)|expectedErrors) with no value type specified in iterable type array#'
 
-        # overly detailed
-        - '#Class Symplify\\PHPStanRules\\Collector\\(.*?) implements generic interface PHPStan\\Collectors\\Collector but does not specify its types\: TNodeType, TValue#'
-
         # useful to have IDE know the types
         - identifier: phpstanApi.instanceofType
 
diff --git a/src/Collector/ImplementedInterfaceCollector.php b/src/Collector/ImplementedInterfaceCollector.php
deleted file mode 100644
index 727361c2..00000000
--- a/src/Collector/ImplementedInterfaceCollector.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Collector;
-
-use PhpParser\Node;
-use PhpParser\Node\Stmt\Class_;
-use PHPStan\Analyser\Scope;
-use PHPStan\Collectors\Collector;
-
-final class ImplementedInterfaceCollector implements Collector
-{
-    public function getNodeType(): string
-    {
-        return Class_::class;
-    }
-
-    /**
-     * @param Class_ $node
-     * @return non-empty-array<string>|null
-     */
-    public function processNode(Node $node, Scope $scope): ?array
-    {
-        $implementedInterfaceNames = [];
-
-        // skip abstract classes, as they can enforce child implementations
-        if ($node->isAbstract()) {
-            return null;
-        }
-
-        foreach ($node->implements as $implement) {
-            $implementedInterfaceNames[] = $implement->toString();
-        }
-
-        if ($implementedInterfaceNames === []) {
-            return null;
-        }
-
-        return $implementedInterfaceNames;
-    }
-}
diff --git a/src/Collector/InterfaceCollector.php b/src/Collector/InterfaceCollector.php
deleted file mode 100644
index 04fc1aa8..00000000
--- a/src/Collector/InterfaceCollector.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Collector;
-
-use PhpParser\Node;
-use PhpParser\Node\Name;
-use PhpParser\Node\Stmt\Interface_;
-use PHPStan\Analyser\Scope;
-use PHPStan\Collectors\Collector;
-
-final class InterfaceCollector implements Collector
-{
-    public function getNodeType(): string
-    {
-        return Interface_::class;
-    }
-
-    /**
-     * @param Interface_ $node
-     */
-    public function processNode(Node $node, Scope $scope): ?string
-    {
-        if (! $node->namespacedName instanceof Name) {
-            return null;
-        }
-
-        return $node->namespacedName->toString();
-    }
-}
diff --git a/src/Collector/InterfaceOfAbstractClassCollector.php b/src/Collector/InterfaceOfAbstractClassCollector.php
deleted file mode 100644
index 17c1fa76..00000000
--- a/src/Collector/InterfaceOfAbstractClassCollector.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Collector;
-
-use PhpParser\Node;
-use PhpParser\Node\Stmt\Class_;
-use PHPStan\Analyser\Scope;
-use PHPStan\Collectors\Collector;
-
-final class InterfaceOfAbstractClassCollector implements Collector
-{
-    public function getNodeType(): string
-    {
-        return Class_::class;
-    }
-
-    /**
-     * @param Class_ $node
-     * @return non-empty-array<string>|null
-     */
-    public function processNode(Node $node, Scope $scope): ?array
-    {
-        if (! $node->isAbstract()) {
-            return null;
-        }
-
-        $interfaceNames = [];
-
-        foreach ($node->implements as $implement) {
-            $interfaceNames[] = $implement->toString();
-        }
-
-        if ($interfaceNames === []) {
-            return null;
-        }
-
-        return $interfaceNames;
-    }
-}
diff --git a/src/Enum/RuleIdentifier.php b/src/Enum/RuleIdentifier.php
index 6c3ce298..e3890d45 100644
--- a/src/Enum/RuleIdentifier.php
+++ b/src/Enum/RuleIdentifier.php
@@ -36,11 +36,6 @@ final class RuleIdentifier
      */
     public const PHP_PARSER_NO_LEADING_BACKSLASH_IN_NAME = 'phpParser.noLeadingBackslashInName';
 
-    /**
-     * @var string
-     */
-    public const NO_SINGLE_INTERFACE_IMPLEMENTER = 'symplify.noSingleInterfaceImplementer';
-
     /**
      * @var string
      */
diff --git a/src/Rules/NoSingleInterfaceImplementerRule.php b/src/Rules/NoSingleInterfaceImplementerRule.php
deleted file mode 100644
index 22c4f04a..00000000
--- a/src/Rules/NoSingleInterfaceImplementerRule.php
+++ /dev/null
@@ -1,98 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Rules;
-
-use Nette\Utils\Arrays;
-use PhpParser\Node;
-use PHPStan\Analyser\Scope;
-use PHPStan\Node\CollectedDataNode;
-use PHPStan\Reflection\ReflectionProvider;
-use PHPStan\Rules\Rule;
-use PHPStan\Rules\RuleErrorBuilder;
-use Symplify\PHPStanRules\Collector\ImplementedInterfaceCollector;
-use Symplify\PHPStanRules\Collector\InterfaceCollector;
-use Symplify\PHPStanRules\Collector\InterfaceOfAbstractClassCollector;
-use Symplify\PHPStanRules\Enum\RuleIdentifier;
-
-/**
- * @see \Symplify\PHPStanRules\Tests\Rules\NoSingleInterfaceImplementerRule\NoSingleInterfaceImplementerRuleTest
- *
- * @implements Rule<CollectedDataNode>
- */
-final readonly class NoSingleInterfaceImplementerRule implements Rule
-{
-    /**
-     * @api used in test
-     * @var string
-     */
-    public const ERROR_MESSAGE = 'Interface "%s" has only single implementer. Consider using the class directly as there is no point in using the interface.';
-
-    public function __construct(
-        private ReflectionProvider $reflectionProvider
-    ) {
-    }
-
-    public function getNodeType(): string
-    {
-        return CollectedDataNode::class;
-    }
-
-    /**
-     * @param CollectedDataNode $node
-     */
-    public function processNode(Node $node, Scope $scope): array
-    {
-        $implementedInterfaces = Arrays::flatten($node->get(ImplementedInterfaceCollector::class));
-        $interfaces = Arrays::flatten($node->get(InterfaceCollector::class));
-        $interfacesOfAbstractClass = Arrays::flatten($node->get(InterfaceOfAbstractClassCollector::class));
-
-        $onceUsedInterfaces = $this->resolveOnceUsedInterfaces($implementedInterfaces);
-        $onceImplementedInterfaces = array_intersect($onceUsedInterfaces, $interfaces);
-
-        // remove the abstract class implemented, as required transitionally
-        $onceImplementedInterfaces = array_diff($onceImplementedInterfaces, $interfacesOfAbstractClass);
-
-        if ($onceImplementedInterfaces === []) {
-            return [];
-        }
-
-        $ruleErrors = [];
-        foreach ($onceImplementedInterfaces as $onceImplementedInterface) {
-            $interfaceReflection = $this->reflectionProvider->getClass($onceImplementedInterface);
-
-            // most likely internal
-            if ($interfaceReflection->getFileName() === null) {
-                continue;
-            }
-
-            $ruleErrors[] = RuleErrorBuilder::message(sprintf(self::ERROR_MESSAGE, $onceImplementedInterface))
-                ->file($interfaceReflection->getFileName())
-                ->identifier(RuleIdentifier::NO_SINGLE_INTERFACE_IMPLEMENTER)
-                ->build();
-        }
-
-        return $ruleErrors;
-    }
-
-    /**
-     * @param string[] $implementedInterfaces
-     * @return string[]
-     */
-    private function resolveOnceUsedInterfaces(array $implementedInterfaces): array
-    {
-        $onceUsedInterfaces = [];
-
-        $implementedInterfacesToCount = array_count_values($implementedInterfaces);
-        foreach ($implementedInterfacesToCount as $interfaceName => $countUsed) {
-            if ($countUsed !== 1) {
-                continue;
-            }
-
-            $onceUsedInterfaces[] = $interfaceName;
-        }
-
-        return $onceUsedInterfaces;
-    }
-}
diff --git a/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/AllowAbstract.php b/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/AllowAbstract.php
deleted file mode 100644
index a67c3395..00000000
--- a/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/AllowAbstract.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Tests\Rules\NoSingleInterfaceImplementerRule\Fixture;
-
-abstract class AllowAbstract implements SimpleInterface
-{
-}
diff --git a/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/ImplementsSimpleInterface.php b/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/ImplementsSimpleInterface.php
deleted file mode 100644
index 5126d954..00000000
--- a/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/ImplementsSimpleInterface.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Tests\Rules\NoSingleInterfaceImplementerRule\Fixture;
-
-class ImplementsSimpleInterface implements SimpleInterface
-{
-}
diff --git a/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/SimpleInterface.php b/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/SimpleInterface.php
deleted file mode 100644
index 4f21ca93..00000000
--- a/tests/Rules/NoSingleInterfaceImplementerRule/Fixture/SimpleInterface.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Tests\Rules\NoSingleInterfaceImplementerRule\Fixture;
-
-interface SimpleInterface
-{
-}
diff --git a/tests/Rules/NoSingleInterfaceImplementerRule/NoSingleInterfaceImplementerRuleTest.php b/tests/Rules/NoSingleInterfaceImplementerRule/NoSingleInterfaceImplementerRuleTest.php
deleted file mode 100644
index 2a53d0e7..00000000
--- a/tests/Rules/NoSingleInterfaceImplementerRule/NoSingleInterfaceImplementerRuleTest.php
+++ /dev/null
@@ -1,69 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Symplify\PHPStanRules\Tests\Rules\NoSingleInterfaceImplementerRule;
-
-use Iterator;
-use PHPStan\Rules\Rule;
-use PHPStan\Testing\RuleTestCase;
-use PHPUnit\Framework\Attributes\DataProvider;
-use Symplify\PHPStanRules\Collector\ImplementedInterfaceCollector;
-use Symplify\PHPStanRules\Collector\InterfaceCollector;
-use Symplify\PHPStanRules\Collector\InterfaceOfAbstractClassCollector;
-use Symplify\PHPStanRules\Rules\NoSingleInterfaceImplementerRule;
-use Symplify\PHPStanRules\Tests\Rules\NoSingleInterfaceImplementerRule\Fixture\SimpleInterface;
-
-final class NoSingleInterfaceImplementerRuleTest extends RuleTestCase
-{
-    /**
-     * @param string[] $filePaths
-     */
-    #[DataProvider('provideData')]
-    public function testRule(array $filePaths, array $expectedErrorMessagesWithLines): void
-    {
-        $this->analyse($filePaths, $expectedErrorMessagesWithLines);
-    }
-
-    public static function provideData(): Iterator
-    {
-        yield [[__DIR__ . '/Fixture/SimpleInterface.php'], []];
-        yield [[__DIR__ . '/Fixture/AllowAbstract.php', __DIR__ . '/Fixture/SimpleInterface.php'], []];
-
-        // already counted in abstract class
-        yield [[__DIR__ . '/Fixture/AllowAbstract.php', __DIR__ . '/Fixture/SimpleInterface.php', __DIR__ . '/Fixture/ImplementsSimpleInterface.php'], []];
-
-        yield [
-            [
-                __DIR__ . '/Fixture/SimpleInterface.php',
-                __DIR__ . '/Fixture/ImplementsSimpleInterface.php',
-            ], [
-                [
-                    sprintf(NoSingleInterfaceImplementerRule::ERROR_MESSAGE, SimpleInterface::class),
-                    -1,
-                ],
-            ]];
-    }
-
-    /**
-     * @return string[]
-     */
-    public static function getAdditionalConfigFiles(): array
-    {
-        return [__DIR__ . '/config/configured_rule.neon'];
-    }
-
-    protected function getCollectors(): array
-    {
-        return [
-            self::getContainer()->getByType(ImplementedInterfaceCollector::class),
-            self::getContainer()->getByType(InterfaceCollector::class),
-            self::getContainer()->getByType(InterfaceOfAbstractClassCollector::class),
-        ];
-    }
-
-    protected function getRule(): Rule
-    {
-        return self::getContainer()->getByType(NoSingleInterfaceImplementerRule::class);
-    }
-}
diff --git a/tests/Rules/NoSingleInterfaceImplementerRule/Source/SomeType.php b/tests/Rules/NoSingleInterfaceImplementerRule/Source/SomeType.php
deleted file mode 100644
index f0033281..00000000
--- a/tests/Rules/NoSingleInterfaceImplementerRule/Source/SomeType.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-
-namespace Symplify\PHPStanRules\Tests\Rules\NullableSerializedPropertyRule\Source;
-
-final class SomeType
-{
-}
diff --git a/tests/Rules/NoSingleInterfaceImplementerRule/config/configured_rule.neon b/tests/Rules/NoSingleInterfaceImplementerRule/config/configured_rule.neon
deleted file mode 100644
index 3e4010b3..00000000
--- a/tests/Rules/NoSingleInterfaceImplementerRule/config/configured_rule.neon
+++ /dev/null
@@ -1,3 +0,0 @@
-includes:
-    - ../../../../config/code-complexity-rules.neon
-    - ../../../../config/services/services.neon