[wp-trac] [WordPress Trac] #40363: Remove `current_blog_` cache invalidation from `clean_blog_cache()`

[WordPress Trac]

#40363: Remove `current_blog_` cache invalidation from `clean_blog_cache()`
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 Reporter:  flixos90                  |       Owner:  spacedmonkey
     Type:  defect (bug)              |      Status:  assigned
 Priority:  normal                    |   Milestone:  Awaiting Review
Component:  Networks and Sites        |     Version:
 Severity:  normal                    |  Resolution:
 Keywords:  good-first-bug has-patch  |     Focuses:  multisite
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Comment (by SergeyBiryukov):

 Some history on these cache keys:
 * Introduced in [https://mu.trac.wordpress.org/changeset/1789 mu:1789].
 * Added to WP in [12602] / [12603].
 * Moved to `wp-includes/blogs.php` in [13125].
 * Moved to `clean_blog_cache()` in [22092].
 * Unused since [27359].

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Ticket URL: <https://core.trac.wordpress.org/ticket/40363#comment:10>
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