refactor: rm unused code

packages/example/src/App.tsx

@@ -16,7 +16,6 @@ function App() {
         <ReactBlockSteps value={10} activeClassName="!bg-red-600 text-white"
                          itemClassName="rounded-full fcc bg-red-300 size-5 text-xs" className="fcc x-2 bg-gray-200" />
       </div>
-      <button className="btn btn-info">Button</button>
     </div>
   );
 }

packages/lib/src/index.tsx

@@ -1,10 +1,8 @@
-// import noop from '@jswork/noop';
 import cx from 'classnames';
 import React, { Component, HTMLAttributes } from 'react';
 import ReactList, { ReactListProps } from '@jswork/react-list';
 
 const CLASS_NAME = 'react-block-steps';
-// const uuid = () => Math.random().toString(36).substring(2, 9);
 export type ReactBlockStepsProps = {
   value: number;
   size: number;