How to Hide Eventilla Events Admin Menus

function plt_hide_eventilla_events_menus() {
	//Hide "Tools → Scheduled Actions".
	remove_submenu_page('tools.php', 'action-scheduler');
	//Hide "Settings → Eventilla Settings".
	remove_submenu_page('options-general.php', 'eventilla-wp');

	//Hide "Eventilla Events".
	remove_menu_page('edit.php?post_type=eventilla_event');
	//Hide "Eventilla Events → Eventilla Events".
	remove_submenu_page('edit.php?post_type=eventilla_event', 'edit.php?post_type=eventilla_event');
	//Hide "Eventilla Events → Settings".
	remove_submenu_page('edit.php?post_type=eventilla_event', 'eventilla-wp-settings');
	//Hide "Eventilla Events → Tools".
	remove_submenu_page('edit.php?post_type=eventilla_event', 'eventilla-wp-tools');
}

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

Where do I put this code?