How to Hide Jits Role Editor Admin Menus

function plt_hide_jits_role_editor_menus() {
	//Hide the "Jits" menu.
	remove_menu_page('role-editor');
	//Hide the "Jits → Roles - management" menu.
	remove_submenu_page('role-editor', 'role-editor');
	//Hide the "Jits → Roles - assigns" menu.
	remove_submenu_page('role-editor', 'assign-roles');
}

add_action('admin_menu', 'plt_hide_jits_role_editor_menus', 11);

Where do I put this code?