cros: Remove some unused code in tray_cast.h/cc.

Change-Id: I10dd76c7ec119781c8cf38874cb3d5a9d6193ea2
Reviewed-on: https://chromium-review.googlesource.com/c/1413383Reviewed-by: Tetsui Ohkubo <tetsui@chromium.org>
Commit-Queue: Jacob Dufault <jdufault@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626782}

ash/system/cast/tray_cast.cc

@@ -80,16 +80,6 @@ CastDetailedView::CastDetailedView(
 
 CastDetailedView::~CastDetailedView() = default;
 
-void CastDetailedView::SimulateViewClickedForTest(
-    const std::string& receiver_id) {
-  for (const auto& it : view_to_sink_map_) {
-    if (it.second->id == receiver_id) {
-      HandleViewClicked(it.first);
-      break;
-    }
-  }
-}
-
 void CastDetailedView::CreateItems() {
   CreateScrollableList();
   CreateTitleRow(IDS_ASH_STATUS_TRAY_CAST);

ash/system/cast/tray_cast.h

@@ -25,10 +25,6 @@ class CastDetailedView : public TrayDetailedView {
                    const std::vector<mojom::SinkAndRoutePtr>& sinks_and_routes);
   ~CastDetailedView() override;
 
-  // Makes the detail view think the view associated with the given receiver_id
-  // was clicked. This will start a cast.
-  void SimulateViewClickedForTest(const std::string& receiver_id);
-
   // Updates the list of available receivers.
   void UpdateReceiverList(
       const std::vector<mojom::SinkAndRoutePtr>& sinks_routes);