Move CONSTANT_DEPENDENCIES out of the analyzer public API.

pkg/analyzer/lib/task/dart.dart

Index: pkg/analyzer/lib/task/dart.dart
diff --git a/pkg/analyzer/lib/task/dart.dart b/pkg/analyzer/lib/task/dart.dart
index c99d95098120fe1a45642d8497a93084aa4ba0b0..7356c97f9dc60f1756105d1bc4432186f69ccc88 100644
--- a/pkg/analyzer/lib/task/dart.dart
+++ b/pkg/analyzer/lib/task/dart.dart
@@ -14,16 +14,6 @@ import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/task/model.dart';
 
 /**
- * The list of [Element]s which a given constant element depends on.
- *
- * The result is only available for targets representing a constant [Element]
- * (i.e. a constant variable declaration, a constant constructor, or a
- * parameter element with a default value).
- */
-final ListResultDescriptor<Element> CONSTANT_DEPENDENCIES =
-    new ListResultDescriptor<Element>('CONSTANT_DEPENDENCIES', <Element>[]);
-
-/**
  * The analysis errors associated with a target.
  *
  * The result is only available for targets representing a Dart compilation unit.