How to remove notices in wp-admin

function pr_disable_admin_notices() {
		global $wp_filter;
			if ( is_user_admin() ) {
				if ( isset( $wp_filter['user_admin_notices'] ) ) {
								unset( $wp_filter['user_admin_notices'] );
				}
			} elseif ( isset( $wp_filter['admin_notices'] ) ) {
						unset( $wp_filter['admin_notices'] );
			}
			if ( isset( $wp_filter['all_admin_notices'] ) ) {
						unset( $wp_filter['all_admin_notices'] );
			}
	}
add_action( 'admin_print_scripts', 'pr_disable_admin_notices' );

I would wrap parts of it using current_user_can(‘administrator’).

Reference:

How to remove WordPress admin messages – Quora

www.quora.com