fix(flutter): 移除搜索框识剧入口

lib/pages/discover/widgets/discover_header.dart

@@ -13,14 +13,12 @@ class DiscoverHeader extends StatelessWidget {
     required this.focusNode,
     required this.onChanged,
     required this.loading,
-    required this.onIdentify,
   });
 
   final TextEditingController controller;
   final FocusNode focusNode;
   final ValueChanged<String> onChanged;
   final bool loading;
-  final VoidCallback onIdentify;
 
   @override
   Widget build(BuildContext context) {
@@ -32,7 +30,6 @@ class DiscoverHeader extends StatelessWidget {
           focusNode: focusNode,
           onChanged: onChanged,
           loading: loading,
-          onIdentify: onIdentify,
         ),
       ),
     );