Remove old (dead) app list code.

chrome/browser/ui/ash/app_list/app_list_service_ash.cc

Index: chrome/browser/ui/ash/app_list/app_list_service_ash.cc
diff --git a/chrome/browser/ui/ash/app_list/app_list_service_ash.cc b/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
index 25171e97d848e45eed8ce2fec6870ae421e45603..6e9bc5189c3bb16b5262ce0b0a8c719814c1ff54 100644
--- a/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
+++ b/chrome/browser/ui/ash/app_list/app_list_service_ash.cc
@@ -146,9 +146,7 @@ void AppListServiceAsh::ShowForProfile(Profile* /*default_profile*/) {
 void AppListServiceAsh::ShowForAppInstall(Profile* profile,
                                           const std::string& extension_id,
                                           bool start_discovery_tracking) {
-  if (app_list::switches::IsExperimentalAppListEnabled())
-    ShowAndSwitchToState(app_list::AppListModel::STATE_APPS);
-
+  ShowAndSwitchToState(app_list::AppListModel::STATE_APPS);
   AppListServiceImpl::ShowForAppInstall(profile, extension_id,
                                         start_discovery_tracking);
 }