[wp-trac] [WordPress Trac] #20974: Remove obsolete locale-specific files on upgrade

[WordPress Trac]

#20974: Remove obsolete locale-specific files on upgrade
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 Reporter:  SergeyBiryukov  |      Owner:
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  I18N            |    Version:  3.4
 Severity:  normal          |   Keywords:
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 We used to have `wp-content/languages/ru_RU.css` file in ru_RU package.

 Since #19603, it's no longer needed, but is still left over on upgrade. We
 should probably include it in `$_old_files`.

 I suppose the same applies to zh_CN and he_IL packages ([19825]).

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Ticket URL: <http://core.trac.wordpress.org/ticket/20974>
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