Remove unused timers for JumpList

After landing crrev/2956553002 which removes the metrics, these two
elapsed timers are no longer needed.

Bug: 738126
Change-Id: I04b29e4728cedb9e7f1fc740036d1a6106cbf0a5
Reviewed-on: https://chromium-review.googlesource.com/566990Reviewed-by: Patrick Monette <pmonette@chromium.org>
Commit-Queue: Xi Cheng <chengx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486222}

chrome/browser/win/jumplist.cc

@@ -510,8 +510,6 @@ void JumpList::StartLoadingFavicon() {
     return;
   }
 
-  base::ElapsedTimer timer;
-
   // Ask FaviconService if it has a favicon of a URL.
   // When FaviconService has one, it will call OnFaviconDataAvailable().
   favicon::FaviconService* favicon_service =
@@ -529,8 +527,6 @@ void JumpList::OnFaviconDataAvailable(
     const favicon_base::FaviconImageResult& image_result) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
-  base::ElapsedTimer timer;
-
   // If there is currently a favicon request in progress, it is now outdated,
   // as we have received another, so nullify the handle from the old request.
   task_id_ = base::CancelableTaskTracker::kBadTaskId;