diff --git a/packages/flutter/lib/src/cupertino/route.dart b/packages/flutter/lib/src/cupertino/route.dart
index 1c3ad869f8..f922eaf33e 100644
--- a/packages/flutter/lib/src/cupertino/route.dart
+++ b/packages/flutter/lib/src/cupertino/route.dart
@@ -724,8 +724,6 @@ class _CupertinoBackGestureController<T> {
   /// [fractionalVelocity] as a fraction of screen width per second.
   void dragEnd(double velocity) {
     // Fling in the appropriate direction.
-    // AnimationController.fling is guaranteed to
-    // take at least one frame.
     //
     // This curve has been determined through rigorously eyeballing native iOS
     // animations.