removed redundant value association on label_for args

Author: tareq1988

src/class.settings-api.php

@@ -127,7 +127,7 @@ function admin_init() {
                 $args = array(
                     'id'                => $name,
                     'class'             => isset( $option['class'] ) ? $option['class'] : $name,
-                    'label_for'         => $args['label_for'] = "{$section}[{$name}]",
+                    'label_for'         => "{$section}[{$name}]",
                     'desc'              => isset( $option['desc'] ) ? $option['desc'] : '',
                     'name'              => $label,
                     'section'           => $section,