Disabling GCE environ check since we know we're on App Engine.

application/vendor/oauth2client/client.py

@@ -930,24 +930,7 @@ def _detect_gce_environment(urlopen=None):
       Boolean indicating whether or not the current environment is Google
           Compute Engine.
   """
-  urlopen = urlopen or urllib.request.urlopen
-  # Note: the explicit `timeout` below is a workaround. The underlying
-  # issue is that resolving an unknown host on some networks will take
-  # 20-30 seconds; making this timeout short fixes the issue, but
-  # could lead to false negatives in the event that we are on GCE, but
-  # the metadata resolution was particularly slow. The latter case is
-  # "unlikely".
-  try:
-    response = urlopen('http://metadata.google.internal/', timeout=1)
-    return any('Metadata-Flavor: Google' in header
-               for header in response.info().headers)
-  except socket.timeout:
-    logger.info('Timeout attempting to reach GCE metadata service.')
-    return False
-  except urllib.error.URLError as e:
-    if isinstance(getattr(e, 'reason', None), socket.timeout):
-      logger.info('Timeout attempting to reach GCE metadata service.')
-    return False
+  return False
 
 
 def _get_environment(urlopen=None):