Fix double-import

Author: adreed-msft

ste/downloader-azureFiles_windows.go

@@ -11,8 +11,6 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/Azure/azure-storage-file-go/azfile"
-
 	"github.com/Azure/azure-storage-azcopy/v10/common"
 	"github.com/Azure/azure-storage-azcopy/v10/sddl"
 	"github.com/Azure/azure-storage-file-go/azfile"