devserver: drop rtslib-fb

Doesn't seem to actually be used anywhere, so clean it up.

BUG=chromium:1007152
TEST=CQ passes

Change-Id: I400ea8604d05318203d6239022d37a12cc635272
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2595717
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
3 files changed