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

pkg/analyzer/lib/src/summary/idl.dart

Index: pkg/analyzer/lib/src/summary/idl.dart
diff --git a/pkg/analyzer/lib/src/summary/idl.dart b/pkg/analyzer/lib/src/summary/idl.dart
index c4d7b6d8282c0266fc6768098f0cb75fd69e1dc4..776fef17d1375d10e574251e6dce401b3b5a086f 100644
--- a/pkg/analyzer/lib/src/summary/idl.dart
+++ b/pkg/analyzer/lib/src/summary/idl.dart
@@ -1793,8 +1793,9 @@ abstract class UnlinkedExecutable extends base.SummaryClass {
    * The list of local labels.
    */
   @informative
+  @deprecated
   @Id(22)
-  List<UnlinkedLabel> get localLabels;
+  List<String> get localLabels;
 
   /**
    * The list of local variables.
@@ -2699,37 +2700,6 @@ abstract class UnlinkedImport extends base.SummaryClass {
 }
 
 /**
- * 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 {