Remove visitLabelElement() and visitLocalVariableElement().

pkg/analyzer/lib/src/dart/element/element.dart

Index: pkg/analyzer/lib/src/dart/element/element.dart
diff --git a/pkg/analyzer/lib/src/dart/element/element.dart b/pkg/analyzer/lib/src/dart/element/element.dart
index d313a165421782528b6f591bdb244d67d11e705d..a70fe674ed1921c22c2a3f90df83807230cde4b4 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -5561,7 +5561,7 @@ class LabelElementImpl extends ElementImpl implements LabelElement {
   }
 
   @override
-  T accept<T>(ElementVisitor<T> visitor) => visitor.visitLabelElement(this);
+  T accept<T>(ElementVisitor<T> visitor) => null;

[Brian Wilkerson, 2017/07/06 22:42:52]

It would be better to throw a not-implemented exception, just to make it
explicit that the visitor won't be called.

[scheglov, 2017/07/07 15:05:33]

Done.

 
   /**
    * Create and return [LabelElement]s for the given [unlinkedLabels].
@@ -6382,8 +6382,7 @@ class LocalVariableElementImpl extends NonParameterVariableElementImpl
   }
 
   @override
-  T accept<T>(ElementVisitor<T> visitor) =>
-      visitor.visitLocalVariableElement(this);
+  T accept<T>(ElementVisitor<T> visitor) => null;
 
   @override
   void appendTo(StringBuffer buffer) {