Remove Docker tasks from the CQ

We are diagnosing some authentication issues.

No-Try: true
Change-Id: I27181d823384aa549f91b2b711682e556bdd5f47
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/813116
Reviewed-by: Eric Boren <borenet@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
2 files changed