Don't summarize labels, remove resynthesis code for labels.

pkg/analyzer/lib/src/summary/idl.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.
 
 /**
  * This file is an "idl" style description of the summary format.  It
  * contains abstract classes which declare the interface for reading data from
  * summaries.  It is parsed and transformed into code that implements the
  * summary format.
  *
@@ skipping 1775 matching lines @@
   /**
    * The list of local functions.
    */
   @Id(18)
   List<UnlinkedExecutable> get localFunctions;
 
   /**
    * The list of local labels.
    */
   @informative
+  @deprecated
   @Id(22)
-  List<UnlinkedLabel> get localLabels;
+  List<String> get localLabels;
 
   /**
    * The list of local variables.
    */
   @informative
   @deprecated
   @Id(19)
   List<UnlinkedVariable> get localVariables;
 
   /**
@@ skipping 884 matching lines @@
   /**
    * Offset of the URI string (including quotes) relative to the beginning of
    * the file.  If [isImplicit] is true, zero.
    */
   @informative
   @Id(3)
   int get uriOffset;
 }
 
 /**
- * Unlinked summary information about a label.
- */
-abstract class UnlinkedLabel extends base.SummaryClass {
-  /**
-   * Return `true` if this label is associated with a `switch` member (`case` or
-   * `default`).
-   */
-  @Id(2)
-  bool get isOnSwitchMember;
-
-  /**
-   * Return `true` if this label is associated with a `switch` statement.
-   */
-  @Id(3)
-  bool get isOnSwitchStatement;
-
-  /**
-   * Name of the label.
-   */
-  @Id(0)
-  String get name;
-
-  /**
-   * Offset of the label relative to the beginning of the file.
-   */
-  @informative
-  @Id(1)
-  int get nameOffset;
-}
-
-/**
  * Unlinked summary information about a function parameter.
  */
 abstract class UnlinkedParam extends base.SummaryClass {
   /**
    * Annotations for this parameter.
    */
   @Id(9)
   List<UnlinkedExpr> get annotations;
 
   /**
@@ skipping 639 matching lines @@
   @Id(11)
   int get visibleLength;
 
   /**
    * If a local variable, the beginning of the visible range; zero otherwise.
    */
   @informative
   @Id(12)
   int get visibleOffset;
 }