Remove ExecutableElement.labels altogether.

pkg/analyzer/test/src/summary/resynthesize_common.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.serialization.elements_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 870 matching lines @@
       ExecutableElement original, String desc) {
     if (original is! Member) {
       List<FunctionElement> rFunctions = resynthesized.functions;
       List<FunctionElement> oFunctions = original.functions;
       expect(rFunctions, hasLength(oFunctions.length));
       for (int i = 0; i < oFunctions.length; i++) {
         compareFunctionElements(rFunctions[i], oFunctions[i],
             '$desc local function ${oFunctions[i].name}');
       }
     }
-    if (original is! Member) {
-      List<LabelElement> rLabels = resynthesized.labels;
-      List<LabelElement> oLabels = original.labels;
-      expect(rLabels, hasLength(oLabels.length));
-      for (int i = 0; i < oLabels.length; i++) {
-        compareLabelElements(
-            rLabels[i], oLabels[i], '$desc label ${oLabels[i].name}');
-      }
-    }
   }
 
   void compareMetadata(List<ElementAnnotation> resynthesized,
       List<ElementAnnotation> original, String desc) {
     expect(resynthesized, hasLength(original.length), reason: desc);
     for (int i = 0; i < original.length; i++) {
       compareElementAnnotations(
           resynthesized[i], original[i], '$desc annotation $i');
     }
   }
@@ skipping 14263 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }