Removed NativeAppNavigationController and related code

ios/chrome/browser/native_app_launcher/native_app_navigation_util.h

Index: ios/chrome/browser/native_app_launcher/native_app_navigation_util.h
diff --git a/ios/chrome/browser/native_app_launcher/native_app_navigation_util.h b/ios/chrome/browser/native_app_launcher/native_app_navigation_util.h
deleted file mode 100644
index 36c4fbf6c9bbd48072a8dc6dd0839e6f44acca46..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/native_app_launcher/native_app_navigation_util.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_UTIL_H_
-#define IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_UTIL_H_
-
-namespace web {
-class WebState;
-}  // namespace web
-
-namespace native_app_launcher {
-
-// Returns whether the current state is arrived at via a "link navigation" in
-// the sense of Native App Launcher, i.e. a navigation caused by an explicit
-// user action in the rectangle of the web content area. |web_state| must not
-// be nullptr.
-bool IsLinkNavigation(web::WebState* web_state);
-
-}  // namespace native_app_launcher
-
-#endif  // IOS_CHROME_BROWSER_NATIVE_APP_LAUNCHER_NATIVE_APP_NAVIGATION_UTIL_H_