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-This CL is part of the history_ui_egtest migration, in which
resetBrowsingDataPrefs used to live.

-Cleans up un-used imports and DEPS from history_ui_egtest.

Change-Id: Ie3683213564d22659a9118761206582f71ee502f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1976154Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726512}