How to Hide GeeK! - Movie & Game Database Admin Menus

function plt_hide_geekpress_menus() {
	//Hide "GeeK!".
	remove_menu_page('geek');
	//Hide "GeeK! → GeeK!".
	remove_submenu_page('geek', 'geek');
	//Hide "GeeK! → Movies".
	remove_submenu_page('geek', 'geek#/movies');
	//Hide "GeeK! → Games".
	remove_submenu_page('geek', 'geek#/games');
	//Hide "GeeK! → TV Shows".
	remove_submenu_page('geek', 'geek#/tvshows');
	//Hide "GeeK! → Names".
	remove_submenu_page('geek', 'geek#/names');
	//Hide "GeeK! → Characters".
	remove_submenu_page('geek', 'geek#/characters');
	//Hide "GeeK! → Media".
	remove_submenu_page('geek', 'geek#/media');
	//Hide "GeeK! → Companies".
	remove_submenu_page('geek', 'geek#/companies');
	//Hide "GeeK! → Engines".
	remove_submenu_page('geek', 'geek#/engines');
	//Hide "GeeK! → Platforms".
	remove_submenu_page('geek', 'geek#/platforms');
	//Hide "GeeK! → Articles".
	remove_submenu_page('geek', 'geek#/articles');
	//Hide "GeeK! → Token Services".
	remove_submenu_page('geek', 'geek#/token');
}

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

Where do I put this code?