Remove some @uses references to `apply_filters` and `do_action` rendered redundant by hook documentation.

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First there were two, and now there are three -- in the @since versions that came before and that shall be. And so it will be, says nacin.

Props JustinSainton, SergeyBiryukov, DrewAPicture.
Fixes #26713.

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git-svn-id: http://core.svn.wordpress.org/trunk@26754 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Being consistent is the gist, no single @since should have been missed.

see #26713.
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git-svn-id: http://core.svn.wordpress.org/trunk@26755 1a063a9b-81f0-0310-95a4-ce76da25c4cd