Remove memento.

pkg/analyzer/lib/src/task/model.dart

Index: pkg/analyzer/lib/src/task/model.dart
diff --git a/pkg/analyzer/lib/src/task/model.dart b/pkg/analyzer/lib/src/task/model.dart
index efdae7683140ae9a0df7afc59c132a2f1863272a..a48f85a983b84d1a74bdcb9394549ee58a013353 100644
--- a/pkg/analyzer/lib/src/task/model.dart
+++ b/pkg/analyzer/lib/src/task/model.dart
@@ -122,10 +122,9 @@ class TaskDescriptorImpl implements TaskDescriptor {
 
   @override
   AnalysisTask createTask(AnalysisContext context, AnalysisTarget target,
-      Map<String, dynamic> inputs, Object inputMemento) {
+      Map<String, dynamic> inputs) {
     AnalysisTask task = buildTask(context, target);
     task.inputs = inputs;
-    task.inputMemento = inputMemento;
     return task;
   }