Enable Pinch Zooming in Mobile

/******************** [ ENABLE MOBILE PINCH ZOOMING ] *******************************/
add_action('after_setup_theme', 'db_remove_et_viewport_meta');
add_action('wp_head', 'db_enable_pinch_zoom');

function db_remove_et_viewport_meta() {
    remove_action('wp_head', 'et_add_viewport_meta');
}
function db_enable_pinch_zoom() {
    echo '<meta name="viewport" content="width=device-width, user-scalable=yes, initial-scale=1.0, minimum-scale=0.1, maximum-scale=10.0">';
}