The build controller is crash looping

[Katharine]

This was triggered by yesterday's bump (#14936). I don't know why. The complete log is this:

{"component":"build","file":"prow/cmd/build/main.go:84","func":"main.(*options).parse","level":"info","msg":"--build-cluster is deprecated, please switch to --kubeconfig","time":"2019-10-25T16:01:06Z"}
{"component":"build","file":"prow/kube/config.go:143","func":"k8s.io/test-infra/prow/kube.LoadClusterConfigs","level":"info","msg":"Loading cluster contexts...","time":"2019-10-25T16:01:06Z"}
{"component":"build","file":"prow/kube/config.go:97","func":"k8s.io/test-infra/prow/kube.buildConfigs","level":"info","msg":"* gke_rules-k8s_us-central1-f_testing","time":"2019-10-25T16:01:06Z"}
{"component":"build","file":"prow/kube/config.go:97","func":"k8s.io/test-infra/prow/kube.buildConfigs","level":"info","msg":"* k8s-tpu-operator","time":"2019-10-25T16:01:06Z"}
{"component":"build","file":"prow/kube/config.go:97","func":"k8s.io/test-infra/prow/kube.buildConfigs","level":"info","msg":"* scalability","time":"2019-10-25T16:01:06Z"}
{"component":"build","file":"prow/kube/config.go:97","func":"k8s.io/test-infra/prow/kube.buildConfigs","level":"info","msg":"* test-infra-trusted","time":"2019-10-25T16:01:06Z"}
{"component":"build","file":"prow/kube/config.go:97","func":"k8s.io/test-infra/prow/kube.buildConfigs","level":"info","msg":"* default","time":"2019-10-25T16:01:06Z"}
{"component":"build","error":"no matches for kind \"Build\" in version \"build.knative.dev/v1alpha1\"","file":"prow/cmd/build/main.go:189","func":"main.main","level":"warning","msg":"Ignoring scalability: knative build CRD not deployed","time":"2019-10-25T16:01:07Z"}
{"component":"build","error":"the cache is not started, can not read objects","file":"prow/cmd/build/main.go:193","func":"main.main","level":"fatal","msg":"Failed to create test-infra-trusted build client","time":"2019-10-25T16:01:07Z"}

I'd roll back, but I'm not sure we actually care? Perhaps we should just remove the build controller entirely instead.

[cjwagner]

We should remove remaining agent: knative-build jobs then remove the controller.
Ref: #14681

[fejta]

@alvaroaleman

Think this could be related to #14939?

[alvaroaleman]

yeah it is, just saw this, I can issue a quick fix
/assign

[fejta]

awesome, thank you!