Remove {SigninManager,PO2TS,AccountTrackerService}::RegisterProfilePref calls from profile_sync_test_util.cc

This is done by identity::IdentityTestEnvironment when it is created.

BUG=920155

Change-Id: I29174997fed10dc6a237bc037462ed2854a1d2f0
Reviewed-on: https://chromium-review.googlesource.com/c/1403154
Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Cr-Commit-Position: refs/heads/master@{#621150}
1 file changed