Remove "@informative" annotation on initializers and local functions.

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 d83c9ef89b3291cf11f2f66763d815409ead7923..4b785ac44c13e33f48359d2fdda8427ea9b46820 100644
--- a/pkg/analyzer/lib/src/summary/idl.dart
+++ b/pkg/analyzer/lib/src/summary/idl.dart
@@ -1713,7 +1713,6 @@ abstract class UnlinkedExecutable extends base.SummaryClass {
   /**
    * The list of local functions.
    */
-  @informative
   @Id(18)
   List<UnlinkedExecutable> get localFunctions;
 
@@ -2624,7 +2623,6 @@ abstract class UnlinkedVariable extends base.SummaryClass {
    * The synthetic initializer function of the variable.  Absent if the variable
    * does not have an initializer.
    */
-  @informative
   @Id(13)
   UnlinkedExecutable get initializer;