removed contact schema ref

Author: vaibhavjainv

msk-lambda-schema-avro-java-sam/MSKAndKafkaClientEC2.yaml

@@ -1289,9 +1289,4 @@ Outputs:
     Description: The Topic to use for the Java Lambda Function
     Value: !Ref KafkaTopicForLambda
     Export:
-      Name: !Sub "${AWS::StackName}-KafkaTopicForLambda"
-  ContactSchemaArn:
-    Description: ARN of the Contact Schema Registry
-    Value: !Ref ContactSchema
-    Export:
-      Name: !Sub "${AWS::StackName}-ContactSchemaArn"
+      Name: !Sub "${AWS::StackName}-KafkaTopicForLambda"