SpringBoot Failure to discover default value for a primitive should not lead to document its default value

See https://github.com/spring-projects/spring-boot/issues/46427 for a concrete example.

If we have a primitive with a default value we can't infer, then its default is documented. We should rather not document the default at all.

Comment From: Kguswo

https://github.com/spring-projects/spring-boot/pull/46551

I just tried to fix the problem. Any feedback would be appreciated.