Remove dead code from 'networking' asset

The code for getting the MachineNetworkCIDR from the survey was only
every used by the kubevirt platform, and it has been dead since that
platform was removed.

Delete the networking asset, which no longer does anything, to prevent
it causing confusion.

Author: zaneb

pkg/asset/installconfig/installconfig.go

@@ -56,7 +56,6 @@ func (a *InstallConfig) Dependencies() []asset.Asset {
 		&sshPublicKey{},
 		&baseDomain{},
 		&clusterName{},
-		&networking{},
 		&pullSecret{},
 		&platform{},
 	}
@@ -67,14 +66,12 @@ func (a *InstallConfig) Generate(parents asset.Parents) error {
 	sshPublicKey := &sshPublicKey{}
 	baseDomain := &baseDomain{}
 	clusterName := &clusterName{}
-	networking := &networking{}
 	pullSecret := &pullSecret{}
 	platform := &platform{}
 	parents.Get(
 		sshPublicKey,
 		baseDomain,
 		clusterName,
-		networking,
 		pullSecret,
 		platform,
 	)
@@ -89,9 +86,6 @@ func (a *InstallConfig) Generate(parents asset.Parents) error {
 		SSHKey:     sshPublicKey.Key,
 		BaseDomain: baseDomain.BaseDomain,
 		PullSecret: pullSecret.PullSecret,
-		Networking: &types.Networking{
-			MachineNetwork: networking.machineNetwork,
-		},
 	}
 
 	a.Config.AlibabaCloud = platform.AlibabaCloud

pkg/asset/installconfig/installconfig_test.go

@@ -27,15 +27,13 @@ func TestInstallConfigGenerate_FillsInDefaults(t *testing.T) {
 		Platform: types.Platform{None: &none.Platform{}},
 	}
 	installConfig := &InstallConfig{}
-	networking := &networking{}
 	parents := asset.Parents{}
 	parents.Add(
 		sshPublicKey,
 		baseDomain,
 		clusterName,
 		pullSecret,
 		platform,
-		networking,
 	)
 	if err := installConfig.Generate(parents); err != nil {
 		t.Errorf("unexpected error generating install config: %v", err)