chore: remove unused code (#4463)

Author: alexander-akait

packages/webpack-cli/src/types.ts

@@ -43,7 +43,6 @@ interface IWebpackCLI {
   toKebabCase: StringFormatter;
   capitalizeFirstLetter: StringFormatter;
   checkPackageExists(packageName: string): boolean;
-  getAvailablePackageManagers(): PackageManager[];
   getDefaultPackageManager(): PackageManager | undefined;
   doInstall(packageName: string, options?: PackageInstallOptions): Promise<string>;
   loadJSONFile<T = unknown>(path: Path, handleError: boolean): Promise<T>;

packages/webpack-cli/src/webpack-cli.ts

@@ -184,33 +184,7 @@ class WebpackCLI implements IWebpackCLI {
     return false;
   }
 
-  getAvailablePackageManagers(): PackageManager[] {
-    const { sync } = require("cross-spawn");
-    const installers: PackageManager[] = ["npm", "yarn", "pnpm"];
-    const hasPackageManagerInstalled = (packageManager: PackageManager) => {
-      try {
-        sync(packageManager, ["--version"]);
-
-        return packageManager;
-      } catch (_err) {
-        return false;
-      }
-    };
-    const availableInstallers = installers.filter((installer) =>
-      hasPackageManagerInstalled(installer),
-    );
-
-    if (!availableInstallers.length) {
-      this.logger.error("No package manager found.");
-
-      process.exit(2);
-    }
-
-    return availableInstallers;
-  }
-
   getDefaultPackageManager(): PackageManager | undefined {
-    const { sync } = require("cross-spawn");
     const hasLocalNpm = fs.existsSync(path.resolve(process.cwd(), "package-lock.json"));
 
     if (hasLocalNpm) {
@@ -229,6 +203,8 @@ class WebpackCLI implements IWebpackCLI {
       return "pnpm";
     }
 
+    const { sync } = require("cross-spawn");
+
     try {
       // the sync function below will fail if npm is not installed,
       // an error will be thrown