Delete an assortment of unneeded paint invalidation code.

sky/engine/core/editing/Caret.h

Index: sky/engine/core/editing/Caret.h
diff --git a/sky/engine/core/editing/Caret.h b/sky/engine/core/editing/Caret.h
index 68d5ef417a9cb0609b2b7df941bc04e30a2e84d5..7535a686869b5b2342c5cbc7a41088acf968047d 100644
--- a/sky/engine/core/editing/Caret.h
+++ b/sky/engine/core/editing/Caret.h
@@ -46,7 +46,6 @@ protected:
     enum CaretVisibility { Visible, Hidden };
     explicit CaretBase(CaretVisibility = Hidden);
 
-    void invalidateCaretRect(Node*, bool caretRectChanged = false);
     void clearCaretRect();
     // Creating VisiblePosition causes synchronous layout so we should use the
     // PositionWithAffinity version if possible.
@@ -67,7 +66,6 @@ protected:
 
 protected:
     static RenderBlock* caretRenderer(Node*);
-    static void invalidateLocalCaretRect(Node*, const LayoutRect&);
 
 private:
     LayoutRect m_caretLocalRect; // caret rect in coords local to the renderer responsible for painting the caret