code: def remove_event(self, func_name: str, event: str) -> None:
          
          event_funcs_copy = self._events[event].copy()
  
          for func in self._event_funcs(event):
              if func.__name__ == func_name:
                  event_funcs_copy.remove(func)
  
          if self._events[event] == event_funcs_copy:
              err_msg = "function doesn't exist inside event {} ".format(event)
              raise EventDoesntExist(err_msg)
          else:
              self._events[event] = event_funcs_copy
docs: Removes a subscribed function from a specific event.
  
          :param func_name: The name of the function to be removed.
          :type func_name: str
  
          :param event: The name of the event.
          :type event: str
  
          :raise EventDoesntExist if there func_name doesn't exist in event.