chore: remove leftover test code (#4246)

(cherry picked from commit 10036f5)

.yarn/versions/dd585676.yml

@@ -0,0 +1,30 @@
+releases:
+  "@yarnpkg/cli": patch
+  "@yarnpkg/parsers": patch
+  "@yarnpkg/plugin-pnp": patch
+  "@yarnpkg/pnp": patch
+
+declined:
+  - "@yarnpkg/esbuild-plugin-pnp"
+  - "@yarnpkg/plugin-compat"
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-dlx"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-init"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-pack"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-pnpm"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/core"
+  - "@yarnpkg/doctor"
+  - "@yarnpkg/nm"
+  - "@yarnpkg/pnpify"
+  - "@yarnpkg/sdks"
+  - "@yarnpkg/shell"

packages/yarnpkg-parsers/sources/grammars/shell.pegjs

@@ -176,7 +176,6 @@ GlobText
 
 EnvVariable
   = [a-zA-Z0-9_]+ { return text() }
-  / [A-Za-z0-9_]+ { return text() }
 
 Identifier
   = [$@*?#a-zA-Z0-9_-]+ { return text() }

packages/yarnpkg-pnp/sources/loader/_entryPoint.ts

@@ -19,9 +19,6 @@ declare var $$SETUP_STATE: (hrs: typeof hydrateRuntimeState, basePath?: NativePa
 const localFs: typeof fs = {...fs};
 const nodeFs = new NodeFS(localFs);
 
-// This is just a test, I'll remove it asap
-(nodeFs as any).__test = true;
-
 const defaultRuntimeState = $$SETUP_STATE(hydrateRuntimeState);
 const defaultPnpapiResolution = __filename;