Build/Test Tools: Fix and standardise calls to the setUp() and setUpBeforeClass() methods in the test suite.

The parent methods should always be called before any test-specific functionality is set up, unless there is a specific and documented reason.

See #52625


git-svn-id: https://develop.svn.wordpress.org/trunk@50449 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/comment/query.php

@@ -13,10 +13,6 @@ class Tests_Comment_Query extends WP_UnitTestCase {
 		self::$post_id = $factory->post->create();
 	}
 
-	function setUp() {
-		parent::setUp();
-	}
-
 	public function test_query() {
 		$c1 = self::factory()->comment->create(
 			array(