Cleanup plugin watch folders

Summary:
Watch folders weren't updated for cross plugin/flipper boundaries that have recently been removed

Fix changes in several source folders not being picked up when fast refresh wasn't enabled

Reviewed By: passy, aigoncharov

Differential Revision: D32626139

fbshipit-source-id: 2c830ec8154ff859ce1e3ee101e5963162d2e0a2

desktop/scripts/get-app-watch-folders.ts

@@ -9,25 +9,12 @@
 
 import fs from 'fs-extra';
 import pFilter from 'p-filter';
-import path from 'path';
 import {getWatchFolders} from 'flipper-pkg-lib';
-import {appDir, publicPluginsDir, fbPluginsDir} from './paths';
-
-/**
- * Flipper references code from below plugins directly. Such directly referenced plugins
- * and their dependencies should be added as watch folders so Metro bundled can resolve them.
- */
-const pluginsReferencedDirectlyFromFlipper = [
-  path.join(publicPluginsDir, 'navigation'),
-  path.join(fbPluginsDir, 'mobileconfig'),
-  path.join(fbPluginsDir, 'watch'),
-];
+import {appDir} from './paths';
 
 export default async function getAppWatchFolders() {
   const getWatchFoldersResults = await Promise.all(
-    [appDir, ...pluginsReferencedDirectlyFromFlipper].map((dir) =>
-      getWatchFolders(dir),
-    ),
+    [appDir].map((dir) => getWatchFolders(dir)),
   );
   const watchFolders = ([] as string[]).concat(...getWatchFoldersResults);
   return pFilter(