Remove dashicons from the front-end for non-admins

functions.php

// remove dashicons
function wpdocs_dequeue_dashicon() {
	if (current_user_can( 'update_core' )) {
	    return;
	}
	wp_deregister_style('dashicons');
}
add_action( 'wp_enqueue_scripts', 'wpdocs_dequeue_dashicon' );