/**
 * Remove Shipping rate submenus
 */
function wpdocs_remove_menus(){
   
	//  Remove Shipping Rate Zone
	remove_submenu_page( 'wpcsr-rate', 'wpcsr-zone' );
	//  Remove Shipping Rate zone
	remove_submenu_page( 'wpcsr-rate', 'wpcsr-location' );
	//  Remove Shipping Rate zone
	remove_submenu_page( 'wpcsr-rate', 'wpcsr-delivery' );
	//  Remove Shipping Rate zone
	remove_submenu_page( 'wpcsr-rate', 'wpcsr-user-group' );
	//  Remove Shipping Rate zone
	remove_submenu_page( 'wpcsr-rate', 'wpcsr-user-group' );
   
}
add_action( 'admin_menu', 'wpdocs_remove_menus', 9999 );