GLContext: Remove global context pointer

Source/Core/VideoBackends/OGL/FramebufferManager.cpp

@@ -9,7 +9,6 @@
 
 #include "Common/Common.h"
 #include "Common/CommonTypes.h"
-#include "Common/GL/GLContext.h"
 #include "Common/Logging/Log.h"
 #include "Common/MsgHandler.h"
 
@@ -414,7 +413,7 @@ FramebufferManager::FramebufferManager(int targetWidth, int targetHeight, int ms
   glBindBuffer(GL_ARRAY_BUFFER,
                static_cast<VertexManager*>(g_vertex_manager.get())->GetVertexBufferHandle());
 
-  if (!g_main_gl_context->IsGLES())
+  if (!static_cast<Renderer*>(g_renderer.get())->IsGLES())
     glEnable(GL_PROGRAM_POINT_SIZE);
 }