Remove wrongly placed event_bus.stop()

The intend of this was to stop the endpoint of
an isolated plugin. However, this code runs in
the main process so at best it doesn't do anything
useful.

The real endpoint.stop() is taken care of from
inside the plugin, running inside the other
process.

Author: cburgdorf

trinity/extensibility/plugin.py

@@ -315,7 +315,6 @@ def _prepare_start(self) -> None:
         self.do_start()
 
     def do_stop(self) -> None:
-        self.context.event_bus.stop()
         kill_process_gracefully(self._process, self.logger)