ash: Remove broken display notification suppression when settings is open

ash/system/web_notification/web_notification_tray_unittest.cc

Index: ash/system/web_notification/web_notification_tray_unittest.cc
diff --git a/ash/system/web_notification/web_notification_tray_unittest.cc b/ash/system/web_notification/web_notification_tray_unittest.cc
index 664ba8ad96c0ebdaa6d7accb2ad81d133ed52132..df0bf0b3f2e4f70ee42275abaf3f7114d64007de 100644
--- a/ash/system/web_notification/web_notification_tray_unittest.cc
+++ b/ash/system/web_notification/web_notification_tray_unittest.cc
@@ -21,7 +21,6 @@
 #include "ash/shell.h"
 #include "ash/test/ash_md_test_base.h"
 #include "ash/test/status_area_widget_test_helper.h"
-#include "ash/test/test_system_tray_delegate.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/display/display.h"
@@ -269,10 +268,6 @@ TEST_P(WebNotificationTrayTest, PopupShownOnBothDisplays) {
   if (!SupportsMultipleDisplays())
     return;
 
-  // Enables to appear the notification for display changes.
-  test::TestSystemTrayDelegate* tray_delegate = GetSystemTrayDelegate();
-  tray_delegate->set_should_show_display_notification(true);
-
   UpdateDisplay("400x400,200x200");
   // UpdateDisplay() creates the display notifications, so popup is visible.
   EXPECT_TRUE(GetTray()->IsPopupVisible());