Remove CheckForUpdate and Update which are no longer used.

I'll submit this once chromeos-chrome's ebuild file gets new enough.

BUG=chromium-os:16563
TEST=gmerge libcros, and conform chrome boots

Change-Id: I856d21020b47b6d66ccd49c0f2216a55448729f3
Reviewed-on: http://gerrit.chromium.org/gerrit/3956
Reviewed-by: Satoru Takabayashi <satorux@chromium.org>
Tested-by: Satoru Takabayashi <satorux@chromium.org>
5 files changed