More pre-MD cleanup

ash/common/system/date/date_view.h

Index: ash/common/system/date/date_view.h
diff --git a/ash/common/system/date/date_view.h b/ash/common/system/date/date_view.h
index 39d7afa67a5d3ae142719c91ea82caf9df53b614..4d3491f10054991ad919ebd356a3f3cda9f834f8 100644
--- a/ash/common/system/date/date_view.h
+++ b/ash/common/system/date/date_view.h
@@ -8,7 +8,6 @@
 #include <memory>
 
 #include "ash/ash_export.h"
-#include "ash/common/system/date/tray_date.h"
 #include "ash/common/system/tray/actionable_view.h"
 #include "base/i18n/time_formatting.h"
 #include "base/macros.h"
@@ -93,11 +92,6 @@ class ASH_EXPORT DateView : public BaseDateTimeView {
   // ActionableView:
   bool PerformAction(const ui::Event& event) override;
 
-  // views::View:
-  void OnMouseEntered(const ui::MouseEvent& event) override;
-  void OnMouseExited(const ui::MouseEvent& event) override;
-  void OnGestureEvent(ui::GestureEvent* event) override;
-
   views::Label* date_label_;
 
   DateAction action_;