Revert "Call plugin unload function after stopping event loop (#539)" (#584)

This reverts commit 39f4f2870b , because functions (seemingly) don't run after the event loop closes, so the unload function is never actually run.

backend/decky_loader/plugin/sandboxed_plugin.py

@@ -143,11 +143,11 @@ class SandboxedPlugin:
 
         if "stop" in data:
             self.log.info("Calling Loader unload function.")
+            await self._unload()
             get_event_loop().stop()
             while get_event_loop().is_running():
                 await sleep(0)
             get_event_loop().close()
-            await self._unload()
             raise Exception("Closing message listener")
 
         d: SocketResponseDict = {"type": SocketMessageType.RESPONSE, "res": None, "success": True, "id": data["id"]}