OpenGL: remove unused OpenGL headers

Source/Core/VideoBackends/OGL/GLUtil.h

@@ -10,13 +10,6 @@
 #include "GLInterface/GLInterface.h"
 #include "GLExtensions/GLExtensions.h"
 
-#ifndef GL_DEPTH24_STENCIL8_EXT // allows FBOs to support stencils
-#define GL_DEPTH_STENCIL_EXT 0x84F9
-#define GL_UNSIGNED_INT_24_8_EXT 0x84FA
-#define GL_DEPTH24_STENCIL8_EXT 0x88F0
-#define GL_TEXTURE_STENCIL_SIZE_EXT 0x88F1
-#endif
-
 #ifndef _WIN32
 
 #include <sys/types.h>
@@ -48,9 +41,4 @@ __forceinline GLenum GL_REPORT_ERROR() { return GL_NO_ERROR; }
 #define DEBUG_GLSL 0
 #endif
 
-// Isn't defined if we aren't using GLEW 1.6
-#ifndef GL_ONE_MINUS_SRC1_ALPHA
-#define GL_ONE_MINUS_SRC1_ALPHA 0x88FB
-#endif
-
 #endif  // _GLINIT_H_

Source/Core/VideoBackends/OGL/Render.cpp

@@ -63,11 +63,6 @@
 #include "AVIDump.h"
 #endif
 
-// glew1.8 doesn't define KHR_debug
-#ifndef GL_DEBUG_OUTPUT
-#define GL_DEBUG_OUTPUT 0x92E0
-#endif
-
 
 void VideoConfig::UpdateProjectionHack()
 {

Source/Core/VideoBackends/OGL/StreamBuffer.h

@@ -10,12 +10,6 @@
 #include "FramebufferManager.h"
 #include "GLUtil.h"
 
-// glew < 1.8 doesn't support pinned memory
-#ifndef GLEW_AMD_pinned_memory
-#define GLEW_AMD_pinned_memory glewIsSupported("GL_AMD_pinned_memory")
-#define GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD 0x9160
-#endif
-
 namespace OGL
 {