Revert "refactor: batch updates using requestIdleCallback, use setTimeout as fallback"

This reverts commit 8c75ec1356.

src/client/update.js

@@ -1,10 +1,4 @@
 import { rootConfigKey } from '../shared/constants'
-import { hasGlobalWindow } from '../utils/window'
-
-const scheduleRefresh = (hasGlobalWindow && window.requestIdleCallback) || function (cb, { timeout }) {
-  return setTimeout(cb, timeout)
-}
-const cancelRefresh = (hasGlobalWindow && window.cancelIdleCallback) || clearTimeout
 
 // store an id to keep track of DOM updates
 let batchId = null
@@ -38,10 +32,10 @@ export function batchUpdate (callback, timeout) {
     return
   }
 
-  cancelRefresh(batchId)
-  batchId = scheduleRefresh(() => {
+  clearTimeout(batchId)
+  batchId = setTimeout(() => {
     callback()
-  }, { timeout })
+  }, timeout)
 
   return batchId
 }