[build] Remove empty optimize directory (#111393)

This folder is no longer used.

src/dev/build/tasks/create_empty_dirs_and_files_task.ts

@@ -12,9 +12,6 @@ export const CreateEmptyDirsAndFiles: Task = {
   description: 'Creating some empty directories and files to prevent file-permission issues',
 
   async run(config, log, build) {
-    await Promise.all([
-      mkdirp(build.resolvePath('plugins')),
-      mkdirp(build.resolvePath('data/optimize')),
-    ]);
+    await Promise.all([mkdirp(build.resolvePath('plugins')), mkdirp(build.resolvePath('data'))]);
   },
 };