qubesd: don't manually unlink the socket

Python 3.13 adds automatic socket cleanup - specifically, a
cleanup_socket parameter to loop.create_unix_server, and it defaults to
True. Manual cleanup is not needed anymore.

qubes/tools/qubesd.py

@@ -72,13 +72,6 @@ def main(args=None):
         loop.run_forever()
         loop.run_until_complete(asyncio.wait([
             loop.create_task(server.wait_closed()) for server in servers]))
-        for sockname in socknames:
-            try:
-                os.unlink(sockname)
-            except FileNotFoundError:
-                args.app.log.warning(
-                    'socket {} got unlinked sometime before shutdown'.format(
-                        sockname))
     finally:
         loop.close()