EM - Remove Coupons CSS from Header

<?php
/********************
Events Manager Pro adds css styling for the coupon (spinning wheel, success and error message) in the header of each and every page. Use this snippet to prevent that to clutter your source code and use your own styling in your style.css.
********************/
function stonehenge_em_remove_coupon_css() {
    remove_action( 'wp_head', array( 'EM_Coupons', 'wp_head' ) );
}
add_action( 'init', 'stonehenge_em_remove_coupon_css' );