Tests: Remove trailing commas in function calls in _wp_array_get() tests.

This fixes parse errors on PHP 7.2 and lower versions.

Follow-up to [49143], [49144], [49580], [50964].

See #51461, #51720, #52625.

git-svn-id: https://develop.svn.wordpress.org/trunk@50970 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/functions/wpArrayGet.php

@@ -68,7 +68,7 @@ class Tests_Functions_wpArrayGet extends WP_UnitTestCase {
 				array(
 					'key' => 4,
 				),
-				array( 'key' ),
+				array( 'key' )
 			),
 			4
 		);
@@ -79,7 +79,7 @@ class Tests_Functions_wpArrayGet extends WP_UnitTestCase {
 				array(
 					'key' => 4,
 				),
-				array( 'invalid' ),
+				array( 'invalid' )
 			),
 			null
 		);