cros-disk: remove disk from mkfs's supplementary groups

We are patching mkfs programs to accept an open fd, so mkfs
no longer needs disk as one of its supplementary groups.

For more info, see: chromium:3304725

BUG=chromium:967569
TEST=CQ

Cq-Depend: chromium:3304908
Change-Id: I4d41f876aa0de31b6a123e21ea42769f210b965a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/3305960
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Marcello Salomao <msalomao@google.com>
Commit-Queue: Marcello Salomao <msalomao@google.com>
1 file changed
tree: 82a6a956cf984e42d16970dd7d202fab8fd15c48
  1. acct-group/
  2. acct-user/
  3. eclass/
  4. metadata/
  5. profiles/
  6. OWNERS
  7. PRESUBMIT.cfg