Revert "Enable cgroups-v2 mode on edgeos"

This reverts commit d2799a0892f0ebd7a718979e089dabdb8dc9705b.

Reason for revert: this breaks taskd (b/221072453#comment10)

BUG=b/221072453
TEST=cuskyctl (http://sponge2/ff3299bc-04cc-4802-a426-bce61257c35f)

Change-Id: I2328e43de76ef5985c5f194dcb8c50b4e4a5bdc4
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/32420
Reviewed-by: Harsh Modi <harshmodi@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Oleksandr Tymoshenko <ovt@google.com>
1 file changed