Remove unused local vars in delete_plugins(), delete_theme(), WP_Date_Query->validate_date_values(), global_terms(), and WP_Text_Diff_Renderer_Table->_changed().

This will clear out the "Unused Code" label in the next Scrutinizer report.

See #30799.


git-svn-id: https://develop.svn.wordpress.org/trunk@31217 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/date.php

@@ -391,7 +391,6 @@ class WP_Date_Query {
 			}
 
 			// Throw a notice for each failing value.
-			$is_between = true;
 			foreach ( (array) $date_query[ $key ] as $_value ) {
 				$is_between = $_value >= $check['min'] && $_value <= $check['max'];