Disable CMB2 styles on front end forms

disable-cmb2-styles-on-front-end-forms.php

<?php

/**
 * Disable CMB2 styles on front end forms.
 *
 * @return bool $enabled Whether to enable (enqueue) styles.
 */
function km_disable_cmb2_front_end_styles( $enabled ) {

	if ( ! is_admin() ) {
		$enabled = false;
	}

	return $enabled;
}
add_filter( 'cmb2_enqueue_css', 'km_disable_cmb2_front_end_styles' );