[wp-trac] [WordPress Trac] #20427: Remove unused _insert_into_post_button() function

[WordPress Trac]

#20427: Remove unused _insert_into_post_button() function
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 Reporter:  SergeyBiryukov  |      Owner:
     Type:  enhancement     |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Media           |    Version:  3.3
 Severity:  normal          |   Keywords:  has-patch
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 `_insert_into_post_button()` is no longer used in core since [18831].

 It's a private function which doesn't seem to be used in any plugins, so I
 guess it can be removed without deprecation.

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Ticket URL: <http://core.trac.wordpress.org/ticket/20427>
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