How to Hide SALESmanago & Leadoo Admin Menus

function plt_hide_salesmanago_menus() {
	//Hide "SALESmanago & Leadoo".
	remove_menu_page('salesmanago-and-leadoo');
	//Hide "SALESmanago & Leadoo → Integrations".
	remove_submenu_page('salesmanago-and-leadoo', 'salesmanago-and-leadoo-main');
	//Hide "SALESmanago & Leadoo → SALESmanago".
	remove_submenu_page('salesmanago-and-leadoo', 'salesmanago-login');
	//Hide "SALESmanago & Leadoo → Leadoo".
	remove_submenu_page('salesmanago-and-leadoo', 'leadoo');
	//Hide "SALESmanago & Leadoo → salesmanago.com".
	remove_submenu_page('salesmanago-and-leadoo', 'https://salesmanago.com');
	//Hide "SALESmanago & Leadoo → leadoo.com".
	remove_submenu_page('salesmanago-and-leadoo', 'https://leadoo.com');
}

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

Where do I put this code?