[Nearby] Remove progress log spam

Payload progress percent logging tends to spam logs and is rarely if
ever useful.

Change-Id: I4eeb5abcc934cdf8b763e924c4a2ac1d0e5658e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2627167
Auto-Submit: James Vecore <vecore@google.com>
Commit-Queue: Josh Nohle <nohle@chromium.org>
Reviewed-by: Josh Nohle <nohle@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843039}

chrome/browser/nearby_sharing/payload_tracker.cc

@@ -128,8 +128,6 @@ void PayloadTracker::OnTransferUpdate() {
     return;
   }
 
-  NS_LOG(VERBOSE) << __func__ << ": Payloads are in progress at " << percent
-                  << " percent.";
   last_update_progress_ = current_progress;
   last_update_timestamp_ = current_time;