Remove stale TODO

CL:2568919 removed the progress center group code that isn't used.

Remove the TODO comment which isn't needed any more.

No-try: true
Bug: 1027012
Change-Id: I4e3e9f50175886479cd3956b1e5f950fdf7f3fd6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2567244Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833048}

ui/file_manager/file_manager/common/js/progress_center_common.js

@@ -208,8 +208,6 @@ class ProgressCenterItem {
 
   /**
    * Clones the item.
-   * TODO(adanilo) This is used by ProgressCenterItemGroup only, remove when
-   * VS feedback panels are turned on permanently.
    * @return {!ProgressCenterItem} New item having the same properties as this.
    */
   clone() {