feat: 删除无用代码

src/js/index.js

-const ua = navigator.userAgent.toLowerCase()
-const testUA = (regexp) => regexp.test(ua)
-const isSafari = testUA(/safari/g) && !testUA(/chrome/g)
-const isWeChat = testUA(/micromessenger/g)
-
 // 用电量、上送电量
 const echart1Data = {
   date: ['8/17', '8/18', '8/19', '8/20', '8/21', '8/22', '8/23'],
@@ -149,12 +144,6 @@ const echart6Data = {
   ],
 }
 
-// 顶部滚动数字数据
-const scrollNumData = {
-  beforeNumArr: [0, 0, 0, 0],
-  afterNumArr: [3.45, 846.0, 68, 36465],
-}
-
 // 中间球体数据
 const ballData = [11, 22, 33, 44, 55, 66]