pkg/asset/manifests/operators: Drop worker-ignition dependency

We'd added this in 4d636d3 (asset/manifests: bootstrap manifest
generation, 2018-08-31, openshift#286) to support the machine-API operator
which had been generating worker machine-sets.  But since e2dc955
(pkg/asset: add ClusterK8sIO, machines.Worker assets, 2018-10-15, openshift#468),
we've been creating those machine-sets ourselves.  And the machine-API
operator dropped their consuming code in
openshift/machine-api-operator@c59151f6 (delete machine/cluster object
loops, 2018-10-22, openshift/machine-api-operator#286).

Dropping this dependency fixes bootstrap Ignition config edits during
a multi-step deploy.  For example, with:

  $ openshift-install --dir=wking create ignition-configs
  $ tree wking
  wking
  ├── bootstrap.ign
  ├── master-0.ign
  └── worker.ign

before this commit, any edits to bootstrap.ign were clobbered in a
subsequent 'create cluster' call, because:

1. The bootstrap Ignition config depends on the manifests.
2. The manifests depended on the worker Ignition config.
3. The worker Ignition config is on disk, so it gets marked dirty.

pkg/asset/manifests/operators.go

@@ -12,7 +12,6 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/openshift/installer/pkg/asset"
-	"github.com/openshift/installer/pkg/asset/ignition/machine"
 	"github.com/openshift/installer/pkg/asset/installconfig"
 	"github.com/openshift/installer/pkg/asset/kubeconfig"
 	"github.com/openshift/installer/pkg/asset/manifests/content/bootkube"
@@ -64,7 +63,6 @@ func (m *Manifests) Dependencies() []asset.Asset {
 		&tls.KubeletCertKey{},
 		&tls.ServiceAccountKeyPair{},
 		&kubeconfig.Admin{},
-		&machine.Worker{},
 	}
 }
 
@@ -117,7 +115,6 @@ func (m *Manifests) generateBootKubeManifests(dependencies asset.Parents) []*ass
 	rootCA := &tls.RootCA{}
 	serviceAccountKeyPair := &tls.ServiceAccountKeyPair{}
 	serviceServingCA := &tls.ServiceServingCA{}
-	workerIgnition := &machine.Worker{}
 	dependencies.Get(
 		installConfig,
 		aggregatorCA,
@@ -133,7 +130,6 @@ func (m *Manifests) generateBootKubeManifests(dependencies asset.Parents) []*ass
 		rootCA,
 		serviceAccountKeyPair,
 		serviceServingCA,
-		workerIgnition,
 	)
 
 	etcdEndpointHostnames := make([]string, installConfig.Config.MasterCount())
@@ -169,15 +165,13 @@ func (m *Manifests) generateBootKubeManifests(dependencies asset.Parents) []*ass
 		ServiceServingCaCert:            base64.StdEncoding.EncodeToString(serviceServingCA.Cert()),
 		ServiceServingCaKey:             base64.StdEncoding.EncodeToString(serviceServingCA.Key()),
 		TectonicNetworkOperatorImage:    "quay.io/coreos/tectonic-network-operator-dev:375423a332f2c12b79438fc6a6da6e448e28ec0f",
-		WorkerIgnConfig:                 base64.StdEncoding.EncodeToString(workerIgnition.Files()[0].Data),
 		CVOClusterID:                    installConfig.Config.ClusterID,
 		EtcdEndpointHostnames:           etcdEndpointHostnames,
 		EtcdEndpointDNSSuffix:           installConfig.Config.BaseDomain,
 	}
 
 	assetData := map[string][]byte{
 		"cluster-apiserver-certs.yaml":          applyTemplateData(bootkube.ClusterApiserverCerts, templateData),
-		"ign-config.yaml":                       applyTemplateData(bootkube.IgnConfig, templateData),
 		"kube-apiserver-secret.yaml":            applyTemplateData(bootkube.KubeApiserverSecret, templateData),
 		"kube-cloud-config.yaml":                applyTemplateData(bootkube.KubeCloudConfig, templateData),
 		"kube-controller-manager-secret.yaml":   applyTemplateData(bootkube.KubeControllerManagerSecret, templateData),