Codechange: remove #ifdef from .cpp files to exclude features

With CMake, these files are simply not compiled to start with.

src/music/dmusic.cpp

@@ -7,8 +7,6 @@
 
 /** @file dmusic.cpp Playing music via DirectMusic. */
 
-#ifdef WIN32_ENABLE_DIRECTMUSIC_SUPPORT
-
 #define INITGUID
 #include "../stdafx.h"
 #ifdef WIN32_LEAN_AND_MEAN
@@ -1241,6 +1239,3 @@ void MusicDriver_DMusic::SetVolume(byte vol)
 {
 	_playback.new_volume = vol;
 }
-
-
-#endif /* WIN32_ENABLE_DIRECTMUSIC_SUPPORT */

src/os/windows/string_uniscribe.cpp

@@ -7,8 +7,6 @@
 
 /** @file string_uniscribe.cpp Functions related to laying out text on Win32. */
 
-#if defined(WITH_UNISCRIBE)
-
 #include "../../stdafx.h"
 #include "../../debug.h"
 #include "string_uniscribe.h"
@@ -620,5 +618,3 @@ const int *UniscribeParagraphLayout::UniscribeVisualRun::GetGlyphToCharMap() con
 
 	return this->utf16_to_utf8[this->cur_pos];
 }
-
-#endif /* defined(WITH_UNISCRIBE) */

src/os/windows/string_uniscribe.h

@@ -10,8 +10,6 @@
 #ifndef STRING_UNISCRIBE_H
 #define STRING_UNISCRIBE_H
 
-#if defined(WITH_UNISCRIBE)
-
 #include "../../gfx_layout.h"
 #include "../../string_base.h"
 #include <vector>
@@ -85,6 +83,4 @@ public:
 	size_t Prev(IterType what) override;
 };
 
-#endif /* defined(WITH_UNISCRIBE) */
-
 #endif /* STRING_UNISCRIBE_H */

src/sound/xaudio2_s.cpp

@@ -7,8 +7,6 @@
 
 /** @file xaudio2_s.cpp XAudio2 sound driver. */
 
-#ifdef WITH_XAUDIO2
-
 #include "../stdafx.h"
 #include "../openttd.h"
 #include "../driver.h"
@@ -267,5 +265,3 @@ void SoundDriver_XAudio2::Stop()
 	FreeLibrary(_xaudio_dll_handle);
 	CoUninitialize();
 }
-
-#endif