How to Hide Explara Events Admin Menus

function plt_hide_explara_events_menus() {
	//Hide the "Explara Events" menu.
	remove_menu_page('explara-events');
	//Hide the "Explara Events → Events" menu.
	remove_submenu_page('explara-events', 'explara-events');
	//Hide the "Explara Events → Settings" menu.
	remove_submenu_page('explara-events', 'explara-events-settings');
}

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

Where do I put this code?