How to Hide CBX Bookmark & Favorite Admin Menus

function plt_hide_cbxwpbookmark_menus() {
	//Hide "CBX Bookmarks".
	remove_menu_page('cbxwpbookmark-dashboard');
	//Hide "CBX Bookmarks → Dashboard".
	remove_submenu_page('cbxwpbookmark-dashboard', 'cbxwpbookmark-dashboard');
	//Hide "CBX Bookmarks → Bookmarks".
	remove_submenu_page('cbxwpbookmark-dashboard', 'cbxwpbookmark-logs');
	//Hide "CBX Bookmarks → Categories".
	remove_submenu_page('cbxwpbookmark-dashboard', 'cbxwpbookmark-cats');
	//Hide "CBX Bookmarks → Setting".
	remove_submenu_page('cbxwpbookmark-dashboard', 'cbxwpbookmark-settings');
	//Hide "CBX Bookmarks → Tools".
	remove_submenu_page('cbxwpbookmark-dashboard', 'cbxwpbookmark-tools');
	//Hide "CBX Bookmarks → Helps  Updates".
	remove_submenu_page('cbxwpbookmark-dashboard', 'cbxwpbookmark-support');
}

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

Where do I put this code?