Removing operationId via customizer does not work anymore

[mb-nick]

Describe the bug

With 2.7.0 it is not possible anymore to remove the operationId via a customizer.
The version we used so far is 2.6.0.
Our customizer looks like this

    @Bean
    public OperationCustomizer operationIdCustomizer() {
        return (operation, handlerMethod) -> {
            operation.setOperationId(null);
            return operation;
        };
    }

The generated operation IDs in the OpenAPI spec are "null_1", "null_2" and so.
With the customizer In 2.6.0 and before the operation ID field was omitted.

To Reproduce
Steps to reproduce the behavior:

• What version of spring-boot you are using?
  • 3.4.0
• What modules and versions of springdoc-openapi are you using?
  • springdoc-openapi-starter-webmvc-ui
  • springdoc-openapi-starter-common

Expected behavior

I expect that, if the operation ID is set to null, that there won't be a field "operationId" for this operation in the generated OpenAPI spec. The field operationId is recommended but not mandatory.

[bnasslahsen]

@mb-nick,

I have added a fix for it.
Can you please test with the latest SNAPHSOT?

[mb-nick]

@bnasslahsen

Sry for the late reply. With 2.7.1-SNAPSHOT it works as expected.
Thx.