remove twitter_cassandra

lib/cassandra_datum/cassandra_retry.rb

@@ -12,36 +12,6 @@ def initialize(message)
         attr_reader :message
       end
     end
-
-    # This code is left here for documentation sake. We used to get TransportException
-    # from Thrift, but there is no equivalent with our CQL driver.
-    ##################################
-    # unless Object.const_defined?('Thrift::TransportException')
-    #   class Thrift::TransportException < Thrift::Exception
-    #     UNKNOWN = 0
-    #     NOT_OPEN = 1
-    #     ALREADY_OPEN = 2
-    #     TIMED_OUT = 3
-    #     END_OF_FILE = 4
-
-    #     attr_reader :type
-
-    #     def initialize(type = UNKNOWN, message = nil)
-    #       super(message)
-    #       @type = type
-    #     end
-    #   end
-    # end
-
-    unless Object.const_defined?('::ThriftClient::NoServersAvailable')
-      class ::ThriftClient::NoServersAvailable < Cassandra::Error
-      end
-    end
-
-    unless Object.const_defined?('::CassandraThrift::TimedOutException')
-      class ::CassandraThrift::TimedOutException < Cassandra::Error
-      end
-    end
   end
 
   module CassandraRetry