remove ext_storage

Author: abrenoch

pubspec.yaml

@@ -29,7 +29,6 @@ dependencies:
       url: https://github.com/canewsin/flutter_absolute_path.git
   path_provider: ^2.0.7
   permission_handler: ^8.3.0
-  ext_storage: ^1.0.3 # Deprecated
   external_path: ^1.0.1
   flutter_local_notifications: ^9.1.2