testgrid: Remove federation from release-1.6-blocking.
The test has never worked for the release-1.6 branch,
and sig-federation has said it's infeasible to fix it.
@@ -1962,9 +1962,6 @@ dashboards:
test_group_name: ci-kubernetes-e2e-gke-serial-release-1.6
- name: gci-gke-serial-1.6
test_group_name: ci-kubernetes-e2e-gci-gke-serial-release-1.6
- # Federation
- - name: gce-federation-1.6
- test_group_name: ci-kubernetes-e2e-gce-federation-release-1.6
# Alpha
- name: gce-alpha-features-1.6
test_group_name: ci-kubernetes-e2e-gce-alpha-features-release-1-6
