Return type of _admin_notice_post_locked unknown phpdoc keyword

[diddledan]

In wp-admin/includes/post.php the return type of _admin_notice_post_locked is documented as none, which is not a valid keyword according to the phpdoc specification: ​https://docs.phpdoc.org/guides/types.html

The attached patch corrects none to be void. Alternatively the @return documentation tag might be removed altogether for the same effect.

[diddledan]

Patch to set return type to void

[SergeyBiryukov]

I think this can just be removed. Per the ​documentation standards:

Note: @return void should not be used outside of the default bundled themes.

[SergeyBiryukov]

In 46732:

Docs: Remove incorrect @return tags.

Props diddledan.
Fixes #48613, #48614.