8289770: Remove Windows version macro from ShellFolder2.cpp

Reviewed-by: jwaters, tr, serb

src/java.desktop/windows/native/libawt/windows/ShellFolder2.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -119,17 +119,6 @@ static jstring lsSize;
 static jstring lsType;
 static jstring lsDate;
 
-// Some macros from awt.h, because it is not included in release
-#ifndef IS_WIN2000
-#define IS_WIN2000 (LOBYTE(LOWORD(::GetVersion())) >= 5)
-#endif
-#ifndef IS_WINXP
-#define IS_WINXP ((IS_WIN2000 && HIBYTE(LOWORD(::GetVersion())) >= 1) || LOBYTE(LOWORD(::GetVersion())) > 5)
-#endif
-#ifndef IS_WINVISTA
-#define IS_WINVISTA (!(::GetVersion() & 0x80000000) && LOBYTE(LOWORD(::GetVersion())) >= 6)
-#endif
-
 
 extern "C" {
 
@@ -1090,12 +1079,10 @@ JNIEXPORT jintArray JNICALL Java_sun_awt_shell_Win32ShellFolder2_getIconBits
                 // XP supports alpha in some icons, and depending on device.
                 // This should take precedence over the icon mask bits.
                 BOOL hasAlpha = FALSE;
-                if (IS_WINXP) {
-                    for (int i = 0; i < nBits; i++) {
-                        if ((colorBits[i] & 0xff000000) != 0) {
-                            hasAlpha = TRUE;
-                            break;
-                        }
+                for (int i = 0; i < nBits; i++) {
+                    if ((colorBits[i] & 0xff000000) != 0) {
+                        hasAlpha = TRUE;
+                        break;
                     }
                 }
                 if (!hasAlpha) {