shorten the if statement

discord/message.py

@@ -1152,9 +1152,7 @@ class Message(Hashable):
             try:
                 await self._state.http.delete_message(self.channel.id, self.id)
             except Exception as e:
-                if silent:
-                    pass
-                else:
+                if not silent:
                     raise e
 
     @overload