Revert [18592] because there are issues to solve with autop/shortcode parsing...

Revert [18592] because there are issues to solve with autop/shortcode parsing ordering before we add this. See #10457 and #19411


git-svn-id: https://core.svn.wordpress.org/trunk@19547 1a063a9b-81f0-0310-95a4-ce76da25c4cd