drop --select usage

This flag records packages in the @world set, but we don't use that
concept in CrOS, nor do we need it.  Drop it everywhere.

BUG=None
TEST=CQ passes

Change-Id: I04913afe2e00f7f72dec57a51035f015c05710d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/1898558
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
4 files changed