HTML API: Remove unused $tag_name variable in WP_HTML_Tag_Processor::set_attribute.

Follow-up to [58472], [58473].

Props davidbinda.
Fixes #61494.




git-svn-id: https://develop.svn.wordpress.org/trunk@58559 602fd350-edb4-49c9-b593-d223f7449a82

Author: audrasjb

src/wp-includes/html-api/class-wp-html-tag-processor.php

@@ -2972,7 +2972,6 @@ public function set_attribute( $name, $value ) {
 		if ( true === $value ) {
 			$updated_attribute = $name;
 		} else {
-			$tag_name        = $this->get_tag();
 			$comparable_name = strtolower( $name );
 
 			/*