Revert of Load and apply a vcgt table from an ICC file to the internal display

ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h

Index: ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
diff --git a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
index 21c314ed95e7aaa2d71e33aa730ae41ae7c10fe5..e23885b8421da46f14021814673441363450ce83 100644
--- a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
+++ b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
@@ -25,8 +25,6 @@
 class DrmDisplaySnapshot;
 class DrmDisplayMode;
 class ScreenManager;
-
-struct GammaRampRGBEntry;
 
 class DrmGpuDisplayManager {
  public:
@@ -57,9 +55,6 @@
 
   bool GetHDCPState(int64_t display_id, HDCPState* state);
   bool SetHDCPState(int64_t display_id, HDCPState state);
-
-  // Set the gamma ramp for a particular display id.
-  void SetGammaRamp(int64_t id, const std::vector<GammaRampRGBEntry>& lut);
 
  private:
   DrmDisplaySnapshot* FindDisplaySnapshot(int64_t id);