Remove old (dead) app list code.

ui/app_list/test/app_list_test_view_delegate.cc

Index: ui/app_list/test/app_list_test_view_delegate.cc
diff --git a/ui/app_list/test/app_list_test_view_delegate.cc b/ui/app_list/test/app_list_test_view_delegate.cc
index 3270830bee580cbdc3cea4a6da03ce78fff446b6..d4c57302dd98531da4ed9eccab1530c08ee35668 100644
--- a/ui/app_list/test/app_list_test_view_delegate.cc
+++ b/ui/app_list/test/app_list_test_view_delegate.cc
@@ -100,10 +100,6 @@ const AppListViewDelegate::Users& AppListTestViewDelegate::GetUsers() const {
   return users_;
 }
 
-bool AppListTestViewDelegate::ShouldCenterWindow() const {
-  return app_list::switches::IsCenteredAppListEnabled();
-}
-
 void AppListTestViewDelegate::ReplaceTestModel(int item_count) {
   model_.reset(new AppListTestModel);
   model_->PopulateApps(item_count);