Remove the help dropdown

add_filter( 'contextual_help', 'l7w_mycontext_remove_help', 999, 3 );
function l7w_mycontext_remove_help($old_help, $screen_id, $screen){
    if ( 'profile' == $screen_id && is_admin() ) {
        $screen->remove_help_tabs();
    }
    return $old_help;
}