common.sh: drop unused interactive code

The last user of this was removed in CL:1079859, so drop it too.

BUG=chromium:844646
TEST=precq passes

Change-Id: Ia281f02c077f9fa683434266dfad0f1b6e33ffcb
Reviewed-on: https://chromium-review.googlesource.com/1483762
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
1 file changed