How to Hide Blog Floating Button Admin Menus

function plt_hide_blog_floating_button_menus() {
	//Hide the "Blog Floating Button" menu.
	remove_menu_page('blog-floating-button');
	//Hide the "Blog Floating Button → 設定" menu.
	remove_submenu_page('blog-floating-button', 'blog-floating-button');
	//Hide the "Blog Floating Button → 解析レポート" menu.
	remove_submenu_page('blog-floating-button', 'blog-floating-button-report');
}

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

Where do I put this code?