GPUDevice: Remove unused file

src/core/settings.h

@@ -6,7 +6,6 @@
 #include "types.h"
 
 #include "util/audio_stream.h"
-#include "util/gpu_types.h"
 
 #include "common/log.h"
 #include "common/settings_interface.h"
@@ -19,6 +18,8 @@
 #include <string_view>
 #include <vector>
 
+enum class RenderAPI : u32;
+
 struct SettingInfo
 {
   enum class Type