Remove CSS Grid Layout and grid media queries.

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

Index: sky/engine/core/rendering/style/StyleRareNonInheritedData.h
diff --git a/sky/engine/core/rendering/style/StyleRareNonInheritedData.h b/sky/engine/core/rendering/style/StyleRareNonInheritedData.h
index 1b4f96707897157e19adb4ecb82b8623f99e6a99..20dc0a60061a7005bc538266a8ef989db6dcbf24 100644
--- a/sky/engine/core/rendering/style/StyleRareNonInheritedData.h
+++ b/sky/engine/core/rendering/style/StyleRareNonInheritedData.h
@@ -50,8 +50,6 @@ class LengthSize;
 class ShadowList;
 class StyleFilterData;
 class StyleFlexibleBoxData;
-class StyleGridData;
-class StyleGridItemData;
 class StyleTransformData;
 class StyleWillChangeData;
 
@@ -102,9 +100,6 @@ public:
 
     DataRef<StyleFilterData> m_filter; // Filter operations (url, sepia, blur, etc.)
 
-    DataRef<StyleGridData> m_grid;
-    DataRef<StyleGridItemData> m_gridItem;
-
     OwnPtr<ContentData> m_content;
     OwnPtr<CounterDirectiveMap> m_counterDirectives;