How to Hide ICDSoft Reseller Store Admin Menus

function plt_hide_icdsoft_reseller_store_menus() {
	//Hide the "ICDSoft Hosting" menu.
	remove_menu_page('icd_hosting');
	//Hide the "ICDSoft Hosting → Settings" menu.
	remove_submenu_page('icd_hosting', 'icd-hosting-welcome');
}

add_action('admin_menu', 'plt_hide_icdsoft_reseller_store_menus', 12);

Where do I put this code?