Remove CSS Grid Layout and grid media queries.

sky/engine/core/css/CSSPrimitiveValueMappings.h

Index: sky/engine/core/css/CSSPrimitiveValueMappings.h
diff --git a/sky/engine/core/css/CSSPrimitiveValueMappings.h b/sky/engine/core/css/CSSPrimitiveValueMappings.h
index 32329936bd91d36d1c91ebe13b10283859837314..8672f2cbb9b99c1ddae430affaa480004ae33341 100644
--- a/sky/engine/core/css/CSSPrimitiveValueMappings.h
+++ b/sky/engine/core/css/CSSPrimitiveValueMappings.h
@@ -978,12 +978,6 @@ template<> inline CSSPrimitiveValue::CSSPrimitiveValue(EDisplay e)
     case INLINE_FLEX:
         m_value.valueID = CSSValueInlineFlex;
         break;
-    case GRID:
-        m_value.valueID = CSSValueGrid;
-        break;
-    case INLINE_GRID:
-        m_value.valueID = CSSValueInlineGrid;
-        break;
     case NONE:
         m_value.valueID = CSSValueNone;
         break;
@@ -996,11 +990,6 @@ template<> inline CSSPrimitiveValue::operator EDisplay() const
     if (m_value.valueID == CSSValueNone)
         return NONE;
 
-    if (m_value.valueID == CSSValueWebkitFlex)
-        return FLEX;
-    if (m_value.valueID == CSSValueWebkitInlineFlex)
-        return INLINE_FLEX;
-
     EDisplay display = static_cast<EDisplay>(m_value.valueID - CSSValueInline);
     ASSERT(display >= INLINE && display <= NONE);
     return display;