Remove unnecessary array_reverse() from wp_get_post_revisions().

WP_Query properly handles multiple 'orderby' values since [28541].

fixes #26042.

git-svn-id: https://develop.svn.wordpress.org/trunk@28543 602fd350-edb4-49c9-b593-d223f7449a82
`$theme_name` is set but no longer used in `wp_dashboard_right_now()`. The theme name is displayed with the call to `update_right_now_message()`.

See #27882.


git-svn-id: https://develop.svn.wordpress.org/trunk@28544 602fd350-edb4-49c9-b593-d223f7449a82
In `wp_dashboard_recent_posts()`, `$i` is set and never used.

See #27882.


git-svn-id: https://develop.svn.wordpress.org/trunk@28545 602fd350-edb4-49c9-b593-d223f7449a82