Don't set __MINGW32__

This took me a few hours of non-stop headaches to figure out. Apparently
deep inside of Wine's headers having __MINGW32__ defined will cause some
GUIDs to be defined slightly differently. This normally wouldn't cause
issues, but when including `shellobj.h` or `objbase.h` this results in
multiple definition linking errors that are basically impossible to
diagnose.

src/wine-host/boost-fix.h

@@ -23,13 +23,11 @@
 // it's running under a WIN32 environment. If anyone knows a better way to do
 // this, please let me know!
 
-#pragma push_macro("__MINGW32__")
 #pragma push_macro("WIN32")
 #pragma push_macro("_WIN32")
 #pragma push_macro("__WIN32__")
 #pragma push_macro("_WIN64")
 
-#undef __MINGW32__
 #undef WIN32
 #undef _WIN32
 #undef __WIN32__
@@ -44,7 +42,6 @@
 #include <boost/asio/basic_socket_streambuf.hpp>
 // #include <boost/asio/detail/timer_queue_ptime.hpp>
 
-#pragma pop_macro("__MINGW32__")
 #pragma pop_macro("WIN32")
 #pragma pop_macro("_WIN32")
 #pragma pop_macro("__WIN32__")

src/wine-host/bridges/vst2.h

@@ -20,10 +20,6 @@
 
 #ifndef NOMINMAX
 #define NOMINMAX
-#define NOSERVICE
-#define NOMCX
-#define NOIMM
-#define WIN32_LEAN_AND_MEAN
 #endif
 #include <vestige/aeffectx.h>
 #include <windows.h>

src/wine-host/editor.h

@@ -22,10 +22,6 @@
 
 #ifndef NOMINMAX
 #define NOMINMAX
-#define NOSERVICE
-#define NOMCX
-#define NOIMM
-#define WIN32_LEAN_AND_MEAN
 #endif
 #include <vestige/aeffectx.h>
 #include <windows.h>

src/wine-host/utils.h

@@ -23,10 +23,6 @@
 
 #ifndef NOMINMAX
 #define NOMINMAX
-#define NOSERVICE
-#define NOMCX
-#define NOIMM
-#define WIN32_LEAN_AND_MEAN
 #endif
 #include <windows.h>