[legacy sf flag] - LayerRenderArea cleanup

LayerRenderArea no longer needs reparentForDrawing()
or flinger field after removing the legacy frontend.

Bug: b/330785038
Test: presubmit
Change-Id: I55828d7f342be55e1c4b7430d2a7cb4a251cad0c
diff --git a/services/surfaceflinger/LayerRenderArea.h b/services/surfaceflinger/LayerRenderArea.h
index aa609ee..b12afe8 100644
--- a/services/surfaceflinger/LayerRenderArea.h
+++ b/services/surfaceflinger/LayerRenderArea.h
@@ -32,29 +32,23 @@
 
 class LayerRenderArea : public RenderArea {
 public:
-    LayerRenderArea(SurfaceFlinger& flinger, sp<Layer> layer, const Rect& crop, ui::Size reqSize,
-                    ui::Dataspace reqDataSpace, bool childrenOnly, bool allowSecureLayers,
-                    const ui::Transform& layerTransform, const Rect& layerBufferSize,
-                    bool hintForSeamlessTransition);
+    LayerRenderArea(sp<Layer> layer, const Rect& crop, ui::Size reqSize, ui::Dataspace reqDataSpace,
+                    bool allowSecureLayers, const ui::Transform& layerTransform,
+                    const Rect& layerBufferSize, bool hintForSeamlessTransition);
 
     const ui::Transform& getTransform() const override;
     bool isSecure() const override;
     sp<const DisplayDevice> getDisplayDevice() const override;
     Rect getSourceCrop() const override;
 
-    void render(std::function<void()> drawLayers) override;
     virtual sp<Layer> getParentLayer() const { return mLayer; }
 
 private:
     const sp<Layer> mLayer;
-    const ui::Transform mLayerTransform;
     const Rect mLayerBufferSize;
     const Rect mCrop;
 
     ui::Transform mTransform;
-
-    SurfaceFlinger& mFlinger;
-    const bool mChildrenOnly;
 };
 
 } // namespace android