In `WP_List_Table::display_rows_or_placeholder()`, the call to `get_column_info()` in unnecessary and unused. The call to `get_column_count()` immediately after makes the same call internally.

See #27882.


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git-svn-id: http://core.svn.wordpress.org/trunk@28107 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Multisite: Treat 'www' as a special subdomain, reversing 3.9 regression.

props jeremyfelt.
fixes #27927.

Built from https://develop.svn.wordpress.org/trunk@28280


git-svn-id: http://core.svn.wordpress.org/trunk@28108 1a063a9b-81f0-0310-95a4-ce76da25c4cd