How to Hide Groundhogg Admin Menus

function plt_hide_groundhogg_menus() {
	//Hide "Groundhogg".
	remove_menu_page('groundhogg');
	//Hide "Groundhogg → Welcome".
	remove_submenu_page('groundhogg', 'groundhogg');
	//Hide "Groundhogg → Reporting".
	remove_submenu_page('groundhogg', 'gh_reporting');
	//Hide "Groundhogg → Help".
	remove_submenu_page('groundhogg', 'gh_help');
	//Hide "Groundhogg → Contacts".
	remove_submenu_page('groundhogg', 'gh_contacts');
	//Hide "Groundhogg → Tags".
	remove_submenu_page('groundhogg', 'gh_tags');
	//Hide "Groundhogg → Emails".
	remove_submenu_page('groundhogg', 'gh_emails');
	//Hide "Groundhogg → Broadcasts".
	remove_submenu_page('groundhogg', 'gh_broadcasts');
	//Hide "Groundhogg → Funnels".
	remove_submenu_page('groundhogg', 'gh_funnels');
	//Hide "Groundhogg → Events".
	remove_submenu_page('groundhogg', 'gh_events');
	//Hide "Groundhogg → Tools".
	remove_submenu_page('groundhogg', 'gh_tools');
	//Hide "Groundhogg → Settings".
	remove_submenu_page('groundhogg', 'gh_settings');
	//Hide "Groundhogg → Go Pro".
	remove_submenu_page('groundhogg', 'gh_go_pro');
}

add_action('admin_menu', 'plt_hide_groundhogg_menus', 100000000);

Where do I put this code?