cros_gcc_config: punt unused script

Nothing calls this script, so delete it and all the helper funcs
that are only used by it.

BUG=None
TEST=precq passes

Change-Id: I9b1552cef045e8023c537829e8079a94be9094e8
Reviewed-on: https://chromium-review.googlesource.com/1087939
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Yunlian Jiang <yunlian@chromium.org>
2 files changed