chore: Remove horizontal scrolling for code blocks

lib/pages/chat/events/html_message.dart

@@ -361,7 +361,6 @@ class HtmlMessage extends StatelessWidget {
         if (element == null) {
           return const TextSpan(text: 'Unable to render code block!');
         }
-        final controller = isInline ? null : ScrollController();
 
         return WidgetSpan(
           child: Material(
@@ -380,17 +379,7 @@ class HtmlMessage extends StatelessWidget {
                       selectionColor: hightlightTextColor.withAlpha(128),
                     ),
                   )
-                : RawScrollbar(
+                : Padding(
-                    thumbVisibility: true,
-                    trackVisibility: true,
-                    controller: controller,
-                    thumbColor: hightlightTextColor,
-                    trackColor: hightlightTextColor.withAlpha(128),
-                    thickness: 8,
-                    child: SingleChildScrollView(
-                      controller: controller,
-                      scrollDirection: Axis.horizontal,
-                      child: Padding(
                     padding: const EdgeInsets.symmetric(
                       horizontal: 8.0,
                       vertical: 4.0,
@@ -403,8 +392,6 @@ class HtmlMessage extends StatelessWidget {
                     ),
                   ),
           ),
-                  ),
-          ),
         );
       case 'img':
         final mxcUrl = Uri.tryParse(node.attributes['src'] ?? '');