How to Hide M Chart Admin Menus

function plt_hide_m_chart_menus() {
	//Hide "Charts".
	remove_menu_page('edit.php?post_type=m-chart');
	//Hide "Charts → Charts".
	remove_submenu_page('edit.php?post_type=m-chart', 'edit.php?post_type=m-chart');
	//Hide "Charts → Add Chart".
	remove_submenu_page('edit.php?post_type=m-chart', 'post-new.php?post_type=m-chart');
	//Hide "Charts → Categories".
	remove_submenu_page('edit.php?post_type=m-chart', 'edit-tags.php?taxonomy=category&post_type=m-chart');
	//Hide "Charts → Tags".
	remove_submenu_page('edit.php?post_type=m-chart', 'edit-tags.php?taxonomy=post_tag&post_type=m-chart');
	//Hide "Charts → Chart Units".
	remove_submenu_page('edit.php?post_type=m-chart', 'edit-tags.php?taxonomy=m-chart-units&post_type=m-chart');
	//Hide "Charts → Settings".
	remove_submenu_page('edit.php?post_type=m-chart', 'm-chart-settings');
}

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

Where do I put this code?