Remove redundant and erroneous `@uses` tag from most core inline documentation.

Per our inline documentation standards, no further use of the `@uses` tag is recommended as used and used-by relationships can be derived through other means. This removes most uses of the tag in core documentation, with remaining tags to be converted to `@global` or `@see` as they apply.

Fixes #30191.

Built from https://develop.svn.wordpress.org/trunk@30105


git-svn-id: http://core.svn.wordpress.org/trunk@30105 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Expand tests around wpmu_delete_blog()

* Test cache after a site is deleted or flagged as deleted.
* Test tables after a site is deleted or flagged as deleted.
* Test tables and cache after the main site is deleted.
* Test site count after a site is deleted or flagged as deleted.

See #30080

Built from https://develop.svn.wordpress.org/trunk@30106


git-svn-id: http://core.svn.wordpress.org/trunk@30106 1a063a9b-81f0-0310-95a4-ce76da25c4cd