googlecompute builder: use config from statebag

builder/googlecompute/builder.go

@@ -52,7 +52,6 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		new(StepCheckExistingImage),
 		&StepCreateSSHKey{
 			Debug:        b.config.PackerDebug,
-			Comm:         &b.config.Comm,
 			DebugKeyPath: fmt.Sprintf("gce_%s.pem", b.config.PackerBuildName),
 		},
 		&StepCreateInstance{

builder/googlecompute/step_create_ssh_key.go

@@ -10,7 +10,6 @@ import (
 	"io/ioutil"
 	"os"
 
-	"github.com/hashicorp/packer/helper/communicator"
 	"github.com/hashicorp/packer/helper/multistep"
 	"github.com/hashicorp/packer/packer"
 	"golang.org/x/crypto/ssh"
@@ -19,7 +18,6 @@ import (
 // StepCreateSSHKey represents a Packer build step that generates SSH key pairs.
 type StepCreateSSHKey struct {
 	Debug        bool
-	Comm         *communicator.Config
 	DebugKeyPath string
 }
 
@@ -29,9 +27,9 @@ func (s *StepCreateSSHKey) Run(_ context.Context, state multistep.StateBag) mult
 	ui := state.Get("ui").(packer.Ui)
 	config := state.Get("config").(*Config)
 
-	if s.Comm.SSHPrivateKeyFile != "" {
+	if config.Comm.SSHPrivateKeyFile != "" {
 		ui.Say("Using existing SSH private key")
-		privateKeyBytes, err := ioutil.ReadFile(s.Comm.SSHPrivateKeyFile)
+		privateKeyBytes, err := ioutil.ReadFile(config.Comm.SSHPrivateKeyFile)
 		if err != nil {
 			state.Put("error", fmt.Errorf(
 				"Error loading configured private key file: %s", err))