Ozone: Dont hardcode format to YUV when using Overlay Composition.

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

Index: ui/ozone/platform/drm/gpu/gbm_buffer.h
diff --git a/ui/ozone/platform/drm/gpu/gbm_buffer.h b/ui/ozone/platform/drm/gpu/gbm_buffer.h
index d63963d8a041d8479475194bd00cc3e1723130e1..661bc1c67658286d16a2be76092f6cef033fce75 100644
--- a/ui/ozone/platform/drm/gpu/gbm_buffer.h
+++ b/ui/ozone/platform/drm/gpu/gbm_buffer.h
@@ -66,10 +66,6 @@ class GbmPixmap : public NativePixmap {
 
  private:
   ~GbmPixmap() override;
-  bool ShouldApplyProcessing(const gfx::Rect& display_bounds,
-                             const gfx::RectF& crop_rect,
-                             gfx::Size* target_size,
-                             gfx::BufferFormat* target_format);
 
   scoped_refptr<GbmBuffer> buffer_;
   base::ScopedFD dma_buf_;