How to Hide Directorist - Business Directory Plugin Admin Menus

function plt_hide_directorist_menus() {
	//Hide "Directory Listings".
	remove_menu_page('edit.php?post_type=at_biz_dir');
	//Hide "Directory Listings → All Listings".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'edit.php?post_type=at_biz_dir');
	//Hide "Directory Listings → Add New Listing".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'post-new.php?post_type=at_biz_dir');
	//Hide "Directory Listings → Categories".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'edit-tags.php?taxonomy=at_biz_dir-category&post_type=at_biz_dir');
	//Hide "Directory Listings → Locations".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'edit-tags.php?taxonomy=at_biz_dir-location&post_type=at_biz_dir');
	//Hide "Directory Listings → Tags".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'edit-tags.php?taxonomy=at_biz_dir-tags&post_type=at_biz_dir');
	//Hide "Directory Listings → Directory Builder".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'atbdp-layout-builder');
	//Hide "Directory Listings → Reviews".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'edit-comments.php?post_type=at_biz_dir');
	//Hide "Directory Listings → Settings".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'atbdp-settings');
	//Hide "Directory Listings → Tools".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'tools');
	//Hide "Directory Listings → Help & Support".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'directorist-status');
	//Hide "Directory Listings → Themes & Extensions".
	remove_submenu_page('edit.php?post_type=at_biz_dir', 'atbdp-extension');
}

add_action('admin_menu', 'plt_hide_directorist_menus', 101);
Where do I put this code?