Remove old (dead) app list code.

ui/app_list/views/apps_container_view.cc

Index: ui/app_list/views/apps_container_view.cc
diff --git a/ui/app_list/views/apps_container_view.cc b/ui/app_list/views/apps_container_view.cc
index 1b72f2d0dd2cb9682ec2e8a5cd4bb92c418c5acf..9b598d62b26a7d8e37fa817a2ea1ce4bc152cae1 100644
--- a/ui/app_list/views/apps_container_view.cc
+++ b/ui/app_list/views/apps_container_view.cc
@@ -24,19 +24,7 @@ AppsContainerView::AppsContainerView(AppListMainView* app_list_main_view,
                                      AppListModel* model)
     : show_state_(SHOW_NONE), top_icon_animation_pending_count_(0) {
   apps_grid_view_ = new AppsGridView(app_list_main_view);
-  int cols;
-  int rows;
-  if (switches::IsExperimentalAppListEnabled()) {
-    cols = kExperimentalPreferredCols;
-    rows = kExperimentalPreferredRows;
-  } else if (app_list_main_view->ShouldCenterWindow()) {
-    cols = kCenteredPreferredCols;
-    rows = kCenteredPreferredRows;
-  } else {
-    cols = kPreferredCols;
-    rows = kPreferredRows;
-  }
-  apps_grid_view_->SetLayout(cols, rows);
+  apps_grid_view_->SetLayout(kPreferredCols, kPreferredRows);
   AddChildView(apps_grid_view_);
 
   folder_background_view_ = new FolderBackgroundView();