Code Modernization: Remove all code using a version_compare() with a PHP version older than PHP 5.6.

Props jrf.
Fixes #48074.

git-svn-id: https://develop.svn.wordpress.org/trunk@46214 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-customize-manager.php

@@ -1376,13 +1376,6 @@ final class WP_Customize_Manager {
 						)
 					);
 
-					// In PHP < 5.6 filesize() returns 0 for the temp files unless we clear the file status cache.
-					// Technically, PHP < 5.6.0 || < 5.5.13 || < 5.4.29 but no need to be so targeted.
-					// See https://bugs.php.net/bug.php?id=65701
-					if ( version_compare( PHP_VERSION, '5.6', '<' ) ) {
-						clearstatcache();
-					}
-
 					$attachment_id = media_handle_sideload( $file_array, 0, null, $attachment_post_data );
 					if ( is_wp_error( $attachment_id ) ) {
 						continue;