Split TypeSystem.typeInformations into member/parameter info

pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library type_graph_inferrer;
 
 import 'dart:collection' show Queue;
 
 import '../compiler.dart' show Compiler;
 import '../elements/elements.dart';
@@ skipping 133 matching lines @@
     return inferrer.getCallersOf(element);
   }
 
   bool isMemberCalledOnce(MemberElement element) {
     if (compiler.disableTypeInference) return false;
     MemberTypeInformation info =
         inferrer.types.getInferredTypeOfMember(element);
     return info.isCalledOnce();
   }
 
-  bool isParameterCalledOnce(ParameterElement element) {
-    if (compiler.disableTypeInference) return false;
-    MemberTypeInformation info =
-        inferrer.types.getInferredTypeOfParameter(element);
-    return info.isCalledOnce();
-  }
-
   void clear() {
     inferrer.clear();
   }
 }