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This patch removes a few obsolete options from the grit tool,
that were not even documented through -h:

  -d and -c <client>, which were allegedly used to handle
   communication with Perforce in the past, and no longer
   needed (or used by the code).

  --psyco, since this project is now dead and unmaintained
   and the flag was never used by the Chromium build.

  '-g <param>' and '-q' are no longer accepted and ignored.

'grit unit' was invoked to run the unit-test suite
and was succesful on Linux.

BUG=None
R=thakis@chromium.org,joi@chromium.org

Change-Id: I97de9a7d3b32bdbe0a050df7719635ddec0cb663
Reviewed-on: https://chromium-review.googlesource.com/631938
Commit-Queue: David Turner <digit@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516362}