remove SocketIO.__del__; close() can handle it
diff --git a/Lib/socket.py b/Lib/socket.py
index a82e48d..7818875 100644
--- a/Lib/socket.py
+++ b/Lib/socket.py
@@ -252,10 +252,6 @@
         self._sock._decref_socketios()
         self._sock = None
 
-    def __del__(self):
-        if not self.closed:
-            self._sock._decref_socketios()
-
 
 def getfqdn(name=''):
     """Get fully qualified domain name from name.