'spring.web.resources.cache.use-last-modified=false' doesn't work with Spring MVC

[fbuechler]

We're using Spring Boot 2.4.4 with Spring MVC to build an application that serves static resources. We noticed that although we set spring.web.resources.cache.use-last-modified=false, the server adds a Last-Modified header.
Looking at the source, the property only seems to be used in WebFluxAutoConfiguration and not in WebMvcAutoConfiguration (https://github.com/spring-projects/spring-boot/search?q=setuselastmodified). Is this intentional or an oversight?

[snicoll]

Thanks for the report, that looks like an oversight to me.

[wilkinsona]

This looks like a regression. It was there originally (in 2.4.0) but was lost in, I think, f1fcfa6.