Coding Standards: Remove superfluous blank lines at the end of various classes.

Note: This is enforced by WPCS 3.0.0.

Follow-up to [56536].

Props jrf.
See #59161, #58831.

git-svn-id: https://develop.svn.wordpress.org/trunk@56547 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/admin/wpPostsListTable.php

@@ -330,5 +330,4 @@ class Tests_Admin_wpPostsListTable extends WP_UnitTestCase {
 
 		$this->assertSame( $expected, $actual );
 	}
-
 }