cros_run_unit_tests: stop installing into $PATH

Since chromite's cros_run_unit_tests is in $PATH and works, stop
installing this stub as that just messes people up.  We keep the
old path around for people running `./cros_run_unit_tests`, but
that doesn't apply to `cros_run_unit_tests`.

BUG=chromium:486263
TEST=precq passes

Change-Id: I8dfc40087e04df2472532e50fc99e6bb4a89cdb6
Reviewed-on: https://chromium-review.googlesource.com/274601
Reviewed-by: Bertrand Simonnet <bsimonnet@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed