Remove workaround for mDNS bug with multi-fabric in the Python tests (#…

…19895)

src/controller/python/test/test_scripts/base.py

@@ -410,14 +410,7 @@ async def TestMultiFabric(self, ip: str, setuppin: int, nodeid: int):
             return False
 
         #
-        # Shutting down controllers results in races where the resolver still delivers
-        # resolution results to a now destroyed controller. Add a sleep for now to work around
-        # it while #14555 is being resolved.
-        time.sleep(1)
-
-        #
-        # Shut-down all the controllers (which will free them up as well as de-initialize the
-        # stack as well.
+        # Shut-down all the controllers (which will free them up)
         #
         self.logger.info(
             "Shutting down controllers & fabrics and re-initing stack...")