chore: remove unnecessary comment in test

Github-Issue: #2107

Author: omar-y-abdi

tests/client/test_list_changed_callback.py

@@ -56,7 +56,6 @@ async def on_resources_list_changed() -> None:
 
     @server.tool("trigger_resource_change")
     async def trigger_resource_change(ctx: Context) -> str:
-        # Notify clients that the resource list has changed
         await ctx.session.send_resource_list_changed()
         return "triggered"