pkg/infrastructure/clusterapi: remove old handler

Removes the original signal handler, which is replaced by
the signal handler in installer main.
pick 1464d8847d main: add top-level context and graceful shutdown

Author: patrickdillon

pkg/infrastructure/clusterapi/clusterapi.go

@@ -17,7 +17,6 @@ import (
 	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
 	utilkubeconfig "sigs.k8s.io/cluster-api/util/kubeconfig"
 	"sigs.k8s.io/controller-runtime/pkg/client"
-	"sigs.k8s.io/controller-runtime/pkg/manager/signals"
 
 	"github.com/openshift/installer/pkg/asset"
 	"github.com/openshift/installer/pkg/asset/cluster/metadata"
@@ -96,15 +95,6 @@ func (i *InfraProvider) Provision(ctx context.Context, dir string, parents asset
 		machineManifests = append(machineManifests, m.Object)
 	}
 
-	// TODO(vincepri): The context should be passed down from the caller,
-	// although today the Asset interface doesn't allow it, refactor once it does.
-	ctx, cancel := context.WithCancel(signals.SetupSignalHandler())
-	go func() {
-		<-ctx.Done()
-		cancel()
-		clusterapi.System().Teardown()
-	}()
-
 	if p, ok := i.impl.(PreProvider); ok {
 		preProvisionInput := PreProvisionInput{
 			InfraID:          clusterID.InfraID,