chore: remove test changes

Author: xsahil03x

sample_app/lib/pages/channel_page.dart

@@ -295,14 +295,6 @@ class _ChannelPageState extends State<ChannelPage> {
           defaultMessageWidget.copyWith(
             onReplyTap: _reply,
             customActions: customOptions,
-            onAttachmentTap: (context, message, attachment) {
-              if (attachment.type == AttachmentType.urlPreview) {
-                print('Hello Attachment');
-                return true;
-              }
-
-              return false;
-            },
             showEditMessage: message.sharedLocation == null,
             onCustomActionTap: (it) async => await switch (it) {
               CreateReminder() => _createReminder(it.message),