cleanup: help rollup removing dead commonjs code

rollup/rollup.config.ts

@@ -510,6 +510,7 @@ export default (args: Record<string, string>): rollup.RollupOptions[] => {
         VSCODE_VERSION: JSON.stringify(vscodeVersion),
         VSCODE_REF: JSON.stringify(vscodeRef),
         VSCODE_COMMIT: JSON.stringify(vscodeCommit),
+        'globalThis.require': 'undefined',
         preventAssignment: true
       }),
       (() => {