Windows:Revert change to wait for OOBE

Signed-off-by: Darren Stahl <darst@microsoft.com>
(cherry picked from commit 6eed7f0cac)
Signed-off-by: Victor Vieux <victorvieux@gmail.com>

daemon/daemon_windows.go

@@ -6,7 +6,6 @@ import (
 	"path/filepath"
 	"strings"
 	"syscall"
-	"unsafe"
 
 	"github.com/Microsoft/hcsshim"
 	"github.com/Sirupsen/logrus"
@@ -245,7 +244,7 @@ func checkSystem() error {
 		return fmt.Errorf("Failed to load vmcompute.dll. Ensure that the Containers role is installed.")
 	}
 
-	return waitOOBEComplete()
+	return nil
 }
 
 // configureKernelSecuritySupport configures and validate security support for the kernel
@@ -617,35 +616,3 @@ func (daemon *Daemon) verifyVolumesInfo(container *container.Container) error {
 func (daemon *Daemon) setupSeccompProfile() error {
 	return nil
 }
-
-func waitOOBEComplete() error {
-	kernel32 := windows.NewLazySystemDLL("kernel32.dll")
-	registerWaitUntilOOBECompleted := kernel32.NewProc("RegisterWaitUntilOOBECompleted")
-	unregisterWaitUntilOOBECompleted := kernel32.NewProc("UnregisterWaitUntilOOBECompleted")
-
-	callbackChan := make(chan struct{})
-	callbackFunc := func(uintptr) uintptr {
-		close(callbackChan)
-		return 0
-	}
-	callbackFuncPtr := syscall.NewCallback(callbackFunc)
-
-	var callbackHandle syscall.Handle
-	ret, _, err := registerWaitUntilOOBECompleted.Call(callbackFuncPtr, 0, uintptr(unsafe.Pointer(&callbackHandle)))
-	if ret == 0 {
-		if err == errInvalidState {
-			return nil
-		}
-		return fmt.Errorf("failed to register OOBEComplete callback. Error: %v", err)
-	}
-
-	// Wait for the callback when OOBE is finished
-	<-callbackChan
-
-	ret, _, err = unregisterWaitUntilOOBECompleted.Call(uintptr(callbackHandle))
-	if ret == 0 {
-		return fmt.Errorf("failed to unregister OOBEComplete callback. Error: %v", err)
-	}
-
-	return nil
-}