url: remove Python 2.7 support code

Differential Revision: https://phab.mercurial-scm.org/D12342

mercurial/url.py

@@ -10,7 +10,6 b''
 
 import base64
 import socket
-import sys
 
 from .i18n import _
 from .pycompat import getattr
@@ -343,16 +342,6 b' class logginghttpconnection(keepalive.HT'
         keepalive.HTTPConnection.__init__(self, *args, **kwargs)
         self._create_connection = createconn
 
-    if sys.version_info < (2, 7, 7):
-        # copied from 2.7.14, since old implementations directly call
-        # socket.create_connection()
-        def connect(self):
-            self.sock = self._create_connection(
-                (self.host, self.port), self.timeout, self.source_address
-            )
-            if self._tunnel_host:
-                self._tunnel()
-
 
 class logginghttphandler(httphandler):
     """HTTP handler that logs socket I/O."""