Remove duplicated profiler metric
Remove duplicated profiler metric

The profiler task is already started inside that method,
and currently generated duplicated metrics that are
exactly the same:

718 .../destination.write/destination_fetch/destination_fetch
718 .../destination.write/destination_fetch

Change-Id: I655567e3ffc257f8cf6f43ef52c27a50fa1bd8f0

google/copybara,google/copybara,google/copybara