Remove tests of irrelevant behavior

Trimmed leading whitespace in the classname list is not significant.
Remove tests for this behavior.

tests/phpunit/tests/html-api/wpHtmlTagProcessor.php

@@ -2875,35 +2875,4 @@ public function insert_after( $new_html ) {
 			'Should have properly applied the update from in front of the cursor.'
 		);
 	}
-
-	/**
-	 * @ticket TBD
-	 *
-	 * @covers ::remove_class
-	 */
-	public function test_remove_class_removes_leading_white_space() {
-		$processor = new WP_HTML_Tag_Processor( '<div class="remove keep">' );
-		$processor->next_tag();
-		$processor->remove_class( 'remove' );
-		$this->assertSame(
-			'<div class="keep">',
-			$processor->get_updated_html(),
-			'::remove_class did not correctly clean whitespace from removed class.'
-		);
-	}
-	/**
-	 * @ticket TBD
-	 *
-	 * @covers ::remove_class
-	 */
-	public function test_remove_class_maintains_trailing_white_space() {
-		$processor = new WP_HTML_Tag_Processor( '<div class="keep          remove">' );
-		$processor->next_tag();
-		$processor->remove_class( 'remove' );
-		$this->assertSame(
-			'<div class="keep">',
-			$processor->get_updated_html(),
-			'::remove_class did not correctly clean whitespace from removed class.'
-		);
-	}
 }