Revert "Do not call get_magic_quote_gpc() when running in PHP version >= 5.4."

This reverts commit 3ec9c23.

The minimum requirement for PLA is 7.0

Author: leenooks

lib/common.php

@@ -297,9 +297,7 @@ function stopwatch() {
  * Strip slashes from GET, POST, and COOKIE variables if this
  * PHP install is configured to automatically addslashes()
  */
-if (@version_compare(phpversion(), '5.4.0', '<') &&
-    @get_magic_quotes_gpc() &&
-    (!isset($slashes_stripped) || !$slashes_stripped)) {
+if (@get_magic_quotes_gpc() && (! isset($slashes_stripped) || ! $slashes_stripped)) {
 	array_stripslashes($_REQUEST);
 	array_stripslashes($_GET);
 	array_stripslashes($_POST);