Revert "Webpack: cache lib.js to disk to prevent occasional OOM"

This reverts commit f630c8892a.

src/middleware/webpack-serve.js

@@ -1,5 +1,4 @@
 import process from 'node:process';
-import fs from 'node:fs';
 import webpack from 'webpack';
 import middleware from 'webpack-dev-middleware';
 import { publicLibConfig } from '../../webpack.config.js';
@@ -17,8 +16,5 @@ export default function getWebpackServeMiddleware() {
         });
     }
 
-    return middleware(compiler, {
-        // @ts-ignore Use actual file system to ease on heap memory usage
-        outputFileSystem: fs,
-    });
+    return middleware(compiler, {});
 }