[LLDB] Rework a MinGW build fix from D65691

[mstorsjo]

Summary

That change didn't contain any explanation for this bit. There shouldn't be any need for a check for MinGW ifdefs here, as long as the include uses lowercase windows.h (as is used consistently elsewhere in the llvm projects).

[labath]

Let's wait for @hhb to give this a spin to avoid twiddling this back and forth.

[hhb]

Thanks!

lldb/trunk/tools/lldb-vscode/VSCode.cpp

 #include <fstream>
 #include <mutex>
 
 #include "LLDBUtils.h"
 #include "VSCode.h"
 #include "llvm/Support/FormatVariadic.h"
 
 #if defined(_WIN32)
-#ifndef __MINGW32__
 #define NOMINMAX
-#include <Windows.h>
-#endif // __MINGW32__
+#include <windows.h>
 #include <fcntl.h>
 #include <io.h>
 #endif
 
 using namespace lldb_vscode;
 
 namespace lldb_vscode {