**To create a new method response header for the 200 response in a method and define it as not required (default)**

Command::

  aws apigateway update-method-response --rest-api-id 1234123412 --resource-id a1b2c3 --http-method GET --status-code 200 --patch-operations op="add",path="/responseParameters/method.response.header.custom-header",value="false"

**To delete a response model for the 200 response in a method**

Command::

  aws apigateway update-method-response --rest-api-id 1234123412 --resource-id a1b2c3 --http-method GET --status-code 200 --patch-operations op="remove",path="/responseModels/application~1json"