Remove all blimp client code.

blimp/client/core/contents/mock_navigation_feature_delegate.cc

Index: blimp/client/core/contents/mock_navigation_feature_delegate.cc
diff --git a/blimp/client/core/contents/mock_navigation_feature_delegate.cc b/blimp/client/core/contents/mock_navigation_feature_delegate.cc
deleted file mode 100644
index f638ef6b753423f77f17e138034ec57bb6536cc6..0000000000000000000000000000000000000000
--- a/blimp/client/core/contents/mock_navigation_feature_delegate.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2016 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.
-
-#include "blimp/client/core/contents/mock_navigation_feature_delegate.h"
-
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "url/gurl.h"
-
-namespace blimp {
-namespace client {
-
-MockNavigationFeatureDelegate::MockNavigationFeatureDelegate() {}
-
-MockNavigationFeatureDelegate::~MockNavigationFeatureDelegate() {}
-
-}  // namespace client
-}  // namespace blimp