chore: remove unused code

[incendial]

What is the purpose of this pull request? (put an "X" next to an item)

• Documentation update
• Bug fix
• New rule
• Changes an existing rule
• Add autofixing to a rule
• Add a CLI option
• Add something to the core
• Other, please explain:

[codecov]

Codecov Report

Merging #1157 (2f72030) into master (588a34d) will increase coverage by 0.29%.
The diff coverage is 100.00%.

❗ Current head 2f72030 differs from pull request most recent head 7ba3ef8. Consider uploading reports for the commit 7ba3ef8 to get more accurate results

@@            Coverage Diff             @@
##           master    #1157      +/-   ##
==========================================
+ Coverage   85.81%   86.11%   +0.29%     
==========================================
  Files         358      359       +1     
  Lines        8072     8073       +1     
==========================================
+ Hits         6927     6952      +25     
+ Misses       1145     1121      -24     

Impacted Files	Coverage Δ
lib/src/analyzer_plugin/analyzer_plugin_utils.dart	100.00% <ø> (+29.31%)	⬆️
.../anti_patterns/anti_patterns_list/long_method.dart	100.00% <ø> (ø)
...tterns/anti_patterns_list/long_parameter_list.dart	100.00% <ø> (ø)
...rs/lint_analyzer/anti_patterns/models/pattern.dart	16.66% <ø> (ø)
...ers/lint_analyzer/anti_patterns/pattern_utils.dart	100.00% <ø> (ø)
.../lint_analyzer/anti_patterns/patterns_factory.dart	100.00% <ø> (+16.66%)	⬆️
...de_climate/models/code_climate_issue_category.dart	100.00% <ø> (ø)
...c/analyzers/lint_analyzer/rules/rules_factory.dart	100.00% <ø> (+25.00%)	⬆️
...refer_correct_edge_insets_constructor/visitor.dart	100.00% <ø> (ø)
lib/src/utils/dart_types_utils.dart	90.47% <ø> (ø)
... and 4 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more