No need to remove floppy controller for 2nd generation vms

Don't want to be prompted for confirmation from powershell commandlets

builder/hyperv/common/step_unmount_floppydrive.go

@@ -11,14 +11,18 @@ import (
 	"github.com/mitchellh/packer/powershell/hyperv"
 )
 
-
 type StepUnmountFloppyDrive struct {
+	Generation uint
 }
 
 func (s *StepUnmountFloppyDrive) Run(state multistep.StateBag) multistep.StepAction {
 	//driver := state.Get("driver").(Driver)
 	ui := state.Get("ui").(packer.Ui)
 
+	if s.Generation > 1 {
+		return multistep.ActionContinue
+	}
+
 	errorMsg := "Error Unmounting floppy drive: %s"
 	vmName := state.Get("vmName").(string)
 

builder/hyperv/iso/builder.go

@@ -345,7 +345,9 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		// remove the integration services dvd drive
 		// after we power down
 		&hypervcommon.StepUnmountSecondaryDvdImages{},
-		&hypervcommon.StepUnmountFloppyDrive{},
+		&hypervcommon.StepUnmountFloppyDrive{
+			Generation: b.config.Generation,
+		},
 		&hypervcommon.StepUnmountDvdDrive{},
 
 		&hypervcommon.StepExportVm{

powershell/hyperv/hyperv.go

@@ -160,7 +160,7 @@ if (($vm.State -ne [Microsoft.HyperV.PowerShell.VMState]::Off) -and ($vm.State -
     Stop-VM -VM $vm -TurnOff -Force -Confirm:$false
 }
 
-Remove-VM -Name $vmName -Force
+Remove-VM -Name $vmName -Force -Confirm:$false
 `
 
 	var ps powershell.PowerShellCmd
@@ -231,7 +231,7 @@ func DeleteVirtualSwitch(switchName string) error {
 param([string]$switchName)
 $switch = Get-VMSwitch -Name $switchName -ErrorAction SilentlyContinue
 if ($switch -ne $null) {
-    $switch | Remove-VMSwitch -Force
+    $switch | Remove-VMSwitch -Force -Confirm:$false
 }
 `
 
@@ -246,7 +246,7 @@ func StartVirtualMachine(vmName string) error {
 param([string]$vmName)
 $vm = Get-VM -Name $vmName -ErrorAction SilentlyContinue
 if ($vm.State -eq [Microsoft.HyperV.PowerShell.VMState]::Off) {
-  Start-VM -Name $vmName
+  Start-VM -Name $vmName -Confirm:$false
 }
 `
 
@@ -259,7 +259,7 @@ func RestartVirtualMachine(vmName string) error {
 
 	var script = `
 param([string]$vmName)
-Restart-VM $vmName -Force
+Restart-VM $vmName -Force -Confirm:$false
 `
 
 	var ps powershell.PowerShellCmd