fix: remove react-native-reanimated and react-native-worklets

These packages require New Architecture (Fabric), which conflicts with
react-native-track-player requiring Old Architecture (newArchEnabled: false).
Neither of these packages was imported anywhere in our code.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

mobile/package.json

@@ -17,11 +17,9 @@
     "react": "19.2.3",
     "react-native": "0.85.3",
     "react-native-gesture-handler": "~2.31.1",
-    "react-native-reanimated": "4.3.1",
     "react-native-safe-area-context": "~5.7.0",
     "react-native-screens": "^4.25.2",
     "react-native-track-player": "^4.1.2",
-    "react-native-worklets": "0.8.3",
     "zustand": "^5.0.14"
   },
   "scripts": {