Remove unused API.

dart/sdk/lib/_internal/compiler/implementation/elements/elements.dart

Index: dart/sdk/lib/_internal/compiler/implementation/elements/elements.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/elements/elements.dart b/dart/sdk/lib/_internal/compiler/implementation/elements/elements.dart
index 41c528a41bd9633353754e49317543427b05c5f3..f06f740fc35c969fc6713a8803f4feb2f85bc097 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/elements/elements.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/elements/elements.dart
@@ -584,13 +584,6 @@ class Elements {
     return false;
   }
 
-  static bool switchStatementHasDefault(SwitchStatement node) {
-    for (SwitchCase switchCase in node.cases) {
-      if (switchCase.isDefaultCase) return true;
-    }
-    return false;
-  }
-
   static bool isUnusedLabel(LabeledStatement node, TreeElements elements) {
     Node body = node.statement;
     TargetElement element = elements[body];
@@ -915,16 +908,11 @@ abstract class ClassElement extends TypeDeclarationElement
   Element lookupSuperMemberInLibrary(String memberName,
                                      LibraryElement library);
 
-  Element lookupSuperInterfaceMember(String memberName,
-                                     LibraryElement fromLibrary);
-
   Element validateConstructorLookupResults(Selector selector,
                                            Element result,
                                            Element noMatch(Element));
 
   Element lookupConstructor(Selector selector, [Element noMatch(Element)]);
-  Element lookupFactoryConstructor(Selector selector,
-                                   [Element noMatch(Element)]);
 
   void forEachMember(void f(ClassElement enclosingClass, Element member),
                      {bool includeBackendMembers: false,