Remove classMembers getter.

pkg/front_end/lib/src/fasta/source/source_library_builder.dart

Index: pkg/front_end/lib/src/fasta/source/source_library_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/source/source_library_builder.dart b/pkg/front_end/lib/src/fasta/source/source_library_builder.dart
index 06b798baa5cd545be6de5f2d1fe3b82b2c24126b..630b90239b93cadfb746c79b77a52a2f5cb43f85 100644
--- a/pkg/front_end/lib/src/fasta/source/source_library_builder.dart
+++ b/pkg/front_end/lib/src/fasta/source/source_library_builder.dart
@@ -86,13 +86,6 @@ abstract class SourceLibraryBuilder<T extends TypeBuilder, R>
 
   List<T> get types => libraryDeclaration.types;
 
-  /// When parsing a class, this returns a map of its members (that have been
-  /// parsed so far).
-  Map<String, MemberBuilder> get classMembers {
-    assert(currentDeclaration.parent == libraryDeclaration);
-    return currentDeclaration.members;
-  }
-
   T addNamedType(String name, List<T> arguments, int charOffset);
 
   T addMixinApplication(T supertype, List<T> mixins, int charOffset);