Removes the compatibility layer for Clipanion 2 (#4262)

* Removes the compatibility layer for Clipanion 2

* Removes compat file

.yarn/versions/6d6580e4.yml

@@ -0,0 +1,23 @@
+releases:
+  "@yarnpkg/cli": major
+
+declined:
+  - "@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-pnp"
+  - "@yarnpkg/plugin-pnpm"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/core"
+  - "@yarnpkg/doctor"

packages/yarnpkg-cli/sources/tools/getPluginConfiguration.val.js

@@ -7,7 +7,7 @@ module.exports = ({modules, plugins}) => {
   }).join(``);
 
   const moduleSegment = `  modules: new Map([\n${modules.map((request, index) => {
-    return `    [${JSON.stringify(require(`${request}/package.json`).name)}, ${request === `clipanion` ? `backportClipanionCompatibility` : ``}(_${index})],\n`;
+    return `    [${JSON.stringify(require(`${request}/package.json`).name)}, _${index}],\n`;
   }).join(``)}  ]),\n`;
 
   const pluginSegment = `  plugins: new Set([\n${plugins.map(request => {
@@ -16,8 +16,6 @@ module.exports = ({modules, plugins}) => {
 
   return {
     code: [
-      `import {backportClipanionCompatibility} from './backportClipanionCompatibility';\n`,
-      `\n`,
       importSegment,
       `export const getPluginConfiguration = () => ({\n`,
       moduleSegment,