Eliminate use of `extract()` in `WP_Post_Comments_List_Table::display()`. The method only needs to read `singular` from `$this->_args`. Extraction is unnecessary.

Eliminate use of `extract()` in `WP_Comments_List_Table::display()`. The method uses no variables. Extraction can be completely removed.

See #22400.


git-svn-id: https://develop.svn.wordpress.org/trunk@28385 602fd350-edb4-49c9-b593-d223f7449a82
Eliminate use of `extract()` in `WP_List_Table::display()`. The method only needs to read `singular` from `$this->_args`. Extraction is unnecessary.

See #22400.


git-svn-id: https://develop.svn.wordpress.org/trunk@28386 602fd350-edb4-49c9-b593-d223f7449a82