Revert of git_cl: Add the ability to set the description. (patchset #3 id:40001 of https://codereview.chromium.org/1922133006/ )

Reason for revert:
splitlines man

Original issue's description:
> git_cl: Add the ability to set the description.
> 
> BUG=607359
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=300357

TBR=iannucci@chromium.org,tandrii@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=607359

Review-Url: https://codereview.chromium.org/1935633002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300360 0039d316-1c4b-4281-b951-d872f2087c98