refactor: Remove unused code

lib/pages/chat/edit_widgets_dialog.dart

@@ -1,34 +0,0 @@
-import 'package:flutter/material.dart';
-
-import 'package:flutter_gen/gen_l10n/l10n.dart';
-import 'package:matrix/matrix.dart';
-
-import 'add_widget_tile.dart';
-
-class EditWidgetsDialog extends StatelessWidget {
-  final Room room;
-
-  const EditWidgetsDialog({super.key, required this.room});
-
-  @override
-  Widget build(BuildContext context) {
-    return SimpleDialog(
-      title: Text(L10n.of(context)!.editWidgets),
-      children: [
-        ...room.widgets.map(
-          (e) => ListTile(
-            title: Text(e.name ?? e.type),
-            leading: IconButton(
-              onPressed: () {
-                room.deleteWidget(e.id!);
-                Navigator.of(context).pop();
-              },
-              icon: const Icon(Icons.delete),
-            ),
-          ),
-        ),
-        AddWidgetTile(room: room),
-      ],
-    );
-  }
-}