Remove empty-cells

sky/engine/core/rendering/style/RenderStyleConstants.h

Index: sky/engine/core/rendering/style/RenderStyleConstants.h
diff --git a/sky/engine/core/rendering/style/RenderStyleConstants.h b/sky/engine/core/rendering/style/RenderStyleConstants.h
index 80904be362e91cd941a3325e271a2e47292423dd..16b2392e7364527a64e408bd84090e8491dd897e 100644
--- a/sky/engine/core/rendering/style/RenderStyleConstants.h
+++ b/sky/engine/core/rendering/style/RenderStyleConstants.h
@@ -191,10 +191,6 @@ enum TextUnderlinePosition {
     TextUnderlinePositionUnder
 };
 
-enum EEmptyCell {
-    SHOW, HIDE
-};
-
 enum EVisibility { VISIBLE, HIDDEN, COLLAPSE };
 
 // The order of this enum must match the order of the display values in CSSValueKeywords.in.