Revert "add a workaround for TextField delete on macOS. (#535)"

This reverts commit 53b9b3f.

Author: boyan01

lib/app.dart

@@ -32,7 +32,6 @@ import 'utils/extension/extension.dart';
 import 'utils/hook.dart';
 import 'utils/logger.dart';
 import 'utils/system/system_fonts.dart';
-import 'utils/system/text_input.dart';
 import 'utils/system/tray.dart';
 import 'widgets/brightness_observer.dart';
 import 'widgets/focus_helper.dart';
@@ -222,11 +221,7 @@ class _App extends StatelessWidget {
                         ? textScaleFactor
                         : mediaQueryData.textScaleFactor,
                   ),
-                  child: SystemTrayWidget(
-                    child: TextInputActionHandler(
-                      child: child!,
-                    ),
-                  ),
+                  child: SystemTrayWidget(child: child!),
                 ),
               );
             },