Add CSS directly into the WP Admin head

This is an example of how to add CSS directly into the WP Admin head. Customise to suit.

/* ----------------------------------------------*/
/* Add CSS directly into the admin head         */
/* ----------------------------------------------*/

add_action( 'admin_head', 'rv_custom_wp_admin_style_head' );
function rv_custom_wp_admin_style_head() { ?>
    <style>
        h3#um_user_screen_block{ display:none !important; }
        #um_role_selector_wrapper{ display:none !important; }
    </style>
<?php 
}

Code language: JavaScript (javascript)