Remove unnecessary __init__

This is to remove unnecessary __init__ to keep code clean.

Change-Id: I3e93a9197150f0a4274b9ed1b65eb12306cbbbf0

keystone/contrib/ec2/controllers.py

@@ -360,9 +360,6 @@ class Ec2ControllerV3(Ec2ControllerCommon, controller.V3Controller):
     collection_name = 'credentials'
     member_name = 'credential'
 
-    def __init__(self):
-        super(Ec2ControllerV3, self).__init__()
-
     def _check_credential_owner_and_user_id_match(self, request, prep_info,
                                                   user_id, credential_id):
         # NOTE(morganfainberg): this method needs to capture the arguments of

keystone/identity/backends/ldap/common.py

@@ -422,7 +422,6 @@ class LDAPHandler(object):
 
     """
 
-    @abc.abstractmethod
     def __init__(self, conn=None):
         self.conn = conn
 
@@ -495,9 +494,6 @@ class PythonLDAPHandler(LDAPHandler):
 
     """
 
-    def __init__(self, conn=None):
-        super(PythonLDAPHandler, self).__init__(conn=conn)
-
     def connect(self, url, page_size=0, alias_dereferencing=None,
                 use_tls=False, tls_cacertfile=None, tls_cacertdir=None,
                 tls_req_cert=ldap.OPT_X_TLS_DEMAND, chase_referrals=None,

keystone/token/providers/uuid.py

@@ -22,8 +22,6 @@ from keystone.token.providers import common
 
 
 class Provider(common.BaseProvider):
-    def __init__(self, *args, **kwargs):
-        super(Provider, self).__init__(*args, **kwargs)
 
     def _get_token_id(self, token_data):
         return uuid.uuid4().hex