Revert "ssh/terminal: account for win32 api changes"

This reverts commit CL 196897 (commit cf60e62b0da83)

Reason for revert: we're reverting the API change instead
in https://go-review.googlesource.com/c/sys/+/197597

Change-Id: I41741c85bb7a07b9ce13264ebb26ee3f968772fa
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/197598
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
diff --git a/util_windows.go b/util_windows.go
index 61312ae..5cfdf8f 100644
--- a/util_windows.go
+++ b/util_windows.go
@@ -94,7 +94,8 @@
 	defer windows.SetConsoleMode(windows.Handle(fd), old)
 
 	var h windows.Handle
-	if err := windows.DuplicateHandle(windows.GetCurrentProcess(), windows.Handle(fd), windows.GetCurrentProcess(), &h, 0, false, windows.DUPLICATE_SAME_ACCESS); err != nil {
+	p, _ := windows.GetCurrentProcess()
+	if err := windows.DuplicateHandle(p, windows.Handle(fd), p, &h, 0, false, windows.DUPLICATE_SAME_ACCESS); err != nil {
 		return nil, err
 	}