remove explicit keyring backend selection

Fixes #759

Author: adorton-adobe

user_sync/config/common.py

@@ -308,14 +308,7 @@ def get_credential(self, name, user_name, none_allowed=False):
 
     @staticmethod
     def get_value_from_keyring(secure_value_key, user_name):
-        import keyrings.cryptfile.cryptfile
-        keyrings.cryptfile.cryptfile.CryptFileKeyring.keyring_key = "none"
-
         import keyring
-        if (isinstance(keyring.get_keyring(), keyring.backends.fail.Keyring) or
-                isinstance(keyring.get_keyring(), keyring.backends.chainer.ChainerBackend)):
-            keyring.set_keyring(keyrings.cryptfile.cryptfile.CryptFileKeyring())
-
         logging.getLogger("keyring").info(
             "Using keyring '" + keyring.get_keyring().name + "' to retrieve: " + secure_value_key)
         return keyring.get_password(service_name=secure_value_key, username=user_name)