squid: Remove broken package

The squid ebuild has a dependency on the Berkeley DB package which was
removed because of licensing issues.

BUG=chromium:1135520
TEST=CQ passes

Change-Id: Idfc343f1a5b2e903a642aa1f7a48cab2577c617a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2517503
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Andreea-Elena Costinas <acostinas@google.com>
Commit-Queue: Andreea-Elena Costinas <acostinas@google.com>
11 files changed