Remove deprecation warning banner from App Launcher code.

ui/app_list/app_list_view_delegate.cc

Index: ui/app_list/app_list_view_delegate.cc
diff --git a/ui/app_list/app_list_view_delegate.cc b/ui/app_list/app_list_view_delegate.cc
index 2ec5b4ac57d4826a1f6f410cbd94b30f8e96b38c..658fdda1960527c4c1effd526a1a998af2d99118 100644
--- a/ui/app_list/app_list_view_delegate.cc
+++ b/ui/app_list/app_list_view_delegate.cc
@@ -13,28 +13,4 @@ AppListViewDelegate::User::User(const User& other) = default;
 
 AppListViewDelegate::User::~User() {}
 
-#if !defined(OS_CHROMEOS)
-base::string16 AppListViewDelegate::GetMessageTitle() const {
-  return base::string16();
-}
-base::string16 AppListViewDelegate::GetMessageText(
-    size_t* message_break) const {
-  *message_break = 0;
-  return base::string16();
-}
-base::string16 AppListViewDelegate::GetAppsShortcutName() const {
-  return base::string16();
-}
-base::string16 AppListViewDelegate::GetLearnMoreText() const {
-  return base::string16();
-}
-base::string16 AppListViewDelegate::GetLearnMoreLink() const {
-  return base::string16();
-}
-gfx::ImageSkia* AppListViewDelegate::GetAppsIcon() const {
-  return nullptr;
-}
-void AppListViewDelegate::OpenLearnMoreLink() {}
-#endif
-
 }  // namespace app_list