Removed useless method, since network cache works with SHA256 instead of MD5.

Signed-off-by: Lucas Carvalho <lucas@nexedi.com>

src/zc/buildout/networkcache.py

@@ -21,13 +21,6 @@ import base64
 import hashlib
 import json
 
-_md5_re = re.compile(r'md5=([a-f0-9]+)')
-
-def _get_md5_from_url(url):
-  match = _md5_re.search(url)
-  if match:
-    return match.group(1)
-  return None
 
 def _get_hash_from_file(path, hash_object):
     """
@@ -187,9 +180,6 @@ def fetch_from_network_cache(network_cache, location, tmp, logger=None):
     if network_cache in (None, ''):
       return None
 
-    # Make a id from URL
-    md5sum = _get_md5_from_url(location)
-
     filename = _get_filename_from_url(location)
     path = os.path.join(tmp, filename)