First pass at removing position:fixed.

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 ca9709a2b6ab1b86fd07c9f3ca01c0591a5ed62b..f34c1cb829b53b2e272784a68781050e98fb6531 100644
--- a/sky/engine/core/css/CSSPrimitiveValueMappings.h
+++ b/sky/engine/core/css/CSSPrimitiveValueMappings.h
@@ -1721,9 +1721,6 @@ template<> inline CSSPrimitiveValue::CSSPrimitiveValue(EPosition e)
     case AbsolutePosition:
         m_value.valueID = CSSValueAbsolute;
         break;
-    case FixedPosition:
-        m_value.valueID = CSSValueFixed;
-        break;
     }
 }
 
@@ -1737,8 +1734,6 @@ template<> inline CSSPrimitiveValue::operator EPosition() const
         return RelativePosition;
     case CSSValueAbsolute:
         return AbsolutePosition;
-    case CSSValueFixed:
-        return FixedPosition;
     default:
         break;
     }