Remove ExperimentalAsh trait usage from ash/*

The trait was used to select pointers for the BRP experiment. BRP is
now fully enabled for Ash, and the experiment is no longer necessary.

Semi-automated via magic of search+replace:
 - " | ExperimentalAsh" -> ""
 - ", ExperimentalAsh" -> ""
 - "ToRawRef<ExperimentalAsh>" -> "ToRawRef"

This CL is a no-op.

Change-Id: I5a96e1ce5a34409eb9efaec2392cf94955910b3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5149011
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Commit-Queue: Bartek Nowierski <bartekn@chromium.org>
Owners-Override: Arthur Sonzogni <arthursonzogni@chromium.org>
Auto-Submit: Bartek Nowierski <bartekn@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1241086}

diff --git a/ash/system/phonehub/camera_roll_view.h b/ash/system/phonehub/camera_roll_view.h
index 8ca5e0d..5ef3ca4 100644
--- a/ash/system/phonehub/camera_roll_view.h
+++ b/ash/system/phonehub/camera_roll_view.h

@@ -74,11 +74,9 @@
   // Update the camera roll section to display the latest items.
   void Update();
 
-  raw_ptr<phonehub::CameraRollManager, ExperimentalAsh> camera_roll_manager_ =
-      nullptr;
-  raw_ptr<phonehub::UserActionRecorder, ExperimentalAsh> user_action_recorder_ =
-      nullptr;
-  raw_ptr<CameraRollItemsView, ExperimentalAsh> items_view_ = nullptr;
+  raw_ptr<phonehub::CameraRollManager> camera_roll_manager_ = nullptr;
+  raw_ptr<phonehub::UserActionRecorder> user_action_recorder_ = nullptr;
+  raw_ptr<CameraRollItemsView> items_view_ = nullptr;
   bool content_present_metric_emitted_ = false;
 };