Remove logging from handle_upgrade()

The logging should be handled directly in send_response() instead, which
is the default of Python's built-in send_response(). Remove this manual
logging to avoid logging the same call twice.

websockify/websocketserver.py

@@ -84,8 +84,6 @@ class WebSocketRequestHandlerMixIn:
             self.send_error(400, str(exc))
             return
 
-        self.log_request(101)
-
         self.request = websocket
 
         # Other requests cannot follow Websocket data