msglist: ScrollToBottomButton _navigateToBottom doesn't require BuildContext to operate

Author: sirpengi

lib/widgets/message_list.dart

@@ -238,7 +238,7 @@ class ScrollToBottomButton extends StatelessWidget {
   final ValueNotifier<bool> visibleValue;
   final ScrollController scrollController;
 
-  Future<void> _navigateToBottom(BuildContext context) async {
+  Future<void> _navigateToBottom() async {
     final distance = scrollController.position.pixels;
     final speedLimitMs = (1000 * distance / 8000).ceil();
     final durationMs = max(300, speedLimitMs);
@@ -261,7 +261,7 @@ class ScrollToBottomButton extends StatelessWidget {
         icon: const Icon(Icons.expand_circle_down_rounded),
         iconSize: 40,
         color: const HSLColor.fromAHSL(0.5,240,0.96,0.68).toColor(),
-        onPressed: () => _navigateToBottom(context)));
+        onPressed: _navigateToBottom));
   }
 }