[Fuchsia] Remove NOTIMPLEMENTED log in TimeZoneMonitorFuchsia

This is a known TODO, so commenting out the unnecessary logging.

Bug: 944885
Change-Id: Ib8816806e6bc5819a82af333973e04c1e4a4bdb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1554652Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Sharon Yang <yangsharon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#648700}

services/device/time_zone_monitor/time_zone_monitor_fuchsia.cc

@@ -26,8 +26,7 @@ class TimeZoneMonitorFuchsia : public TimeZoneMonitor {
 // static
 std::unique_ptr<TimeZoneMonitor> TimeZoneMonitor::Create(
     scoped_refptr<base::SequencedTaskRunner> file_task_runner) {
-  // TODO(fuchsia): Implement this. crbug.com/750934
-  NOTIMPLEMENTED();
+  // TODO(https://crbug.com/750934): Implement a real TimeZoneMonitor.
 
   return std::make_unique<TimeZoneMonitorFuchsia>();
 }