Remove UriReferencedElement with its uri/uriOffset/uriEnd properties.

pkg/analysis_server/lib/src/status/element_writer.dart

Index: pkg/analysis_server/lib/src/status/element_writer.dart
diff --git a/pkg/analysis_server/lib/src/status/element_writer.dart b/pkg/analysis_server/lib/src/status/element_writer.dart
index 91649a59a90be90a978510f9de9b87104721d663..8299ef9d7a12b3cb21aeb41c2678f3bb60b6de51 100644
--- a/pkg/analysis_server/lib/src/status/element_writer.dart
+++ b/pkg/analysis_server/lib/src/status/element_writer.dart
@@ -147,9 +147,6 @@ class ElementWriter extends GeneralizingElementVisitor with TreeWriter {
     if (element is TypeParameterizedElement) {
       properties['typeParameters'] = element.typeParameters;
     }
-    if (element is UriReferencedElement) {
-      properties['uri'] = element.uri;
-    }
     if (element is VariableElement) {
       properties['constantValue'] = element.constantValue;
       properties['hasImplicitType'] = element.hasImplicitType;