Remove unused methods

lib/gitlab/auth.rb

@@ -14,13 +14,5 @@ module Gitlab
         user if user.valid_password?(password)
       end
     end
-
-    def log
-      Gitlab::AppLogger
-    end
-
-    def ldap_conf
-      @ldap_conf ||= Gitlab.config.ldap
-    end
   end
 end

lib/gitlab/oauth/user.rb

@@ -70,10 +70,6 @@ module Gitlab
         Gitlab::AppLogger
       end
 
-      def raise_error(message)
-        raise OmniAuth::Error, "(OAuth) " + message
-      end
-
       def needs_blocking?
         Gitlab.config.omniauth['block_auto_created_users']
       end