Revert "improve column switching performance"

This reverts commit 8813694039.

routes/_components/timeline/LazyTimeline.html

@@ -15,7 +15,6 @@
 <script>
   import { importTimeline } from '../../_utils/asyncModules'
   import { store } from '../../_store/store'
-  import { scheduleIdleTask } from '../../_utils/scheduleIdleTask'
 
   export default {
     oncreate() {
@@ -26,12 +25,7 @@
     },
     store: () => store,
     data: () => ({
-      importTimeline: importTimeline().then(timeline => {
-        return new Promise((resolve) => {
-          // make column-switching more responsive by delaying this load
-          scheduleIdleTask(() => resolve(timeline))
-        })
-      })
+      importTimeline: importTimeline()
     })
   }
 </script>