Remove ClassElementImpl.withClauseRange.

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 9677e893fea33b68fae76034c98569be2a5fee91..41b919386e37d3618ac4dd11335cf19125baff42 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -114,11 +114,6 @@ class ClassElementImpl extends ElementImpl implements ClassElement {
   List<TypeParameterElement> _typeParameters = TypeParameterElement.EMPTY_LIST;
 
   /**
-   * The [SourceRange] of the `with` clause, `null` if there is no one.
-   */
-  SourceRange withClauseRange;
-
-  /**
    * A flag indicating whether the types associated with the instance members of
    * this class have been inferred.
    */