remove EnumElementDecl workaround in getTypeOfReference

Author: hnrklssn

lib/Sema/TypeOfReference.cpp

@@ -977,12 +977,6 @@ ConstraintSystem::getTypeOfReference(ValueDecl *value,
     return { openedType, openedType, openedType, openedType, Type() };
   }
 
-  // FIXME: implement this properly
-  if (auto enumElem = dyn_cast<EnumElementDecl>(value)) {
-    Type interfaceType = enumElem->getInterfaceType();
-    return {interfaceType, interfaceType, interfaceType, interfaceType, Type()};
-  }
-
   // Only remaining case: unqualified reference to a property.
   auto *varDecl = cast<VarDecl>(value);