Changes to Delete custom field

the code response's property type changed from string to no type for status 403

the type response's property type changed from string to no type for status 400

added CodeEnum to the code response property allOf list for the response status 403

added TypeEnum to the type response property allOf list for the response status 400

removed the permission_denied enum value from the code response property for the response status 403

removed the validation_error enum value from the type response property for the response status 400

added the required property metadata to the response with the 400 status