Clean up left-overs of PushSubscription.subscriptionId.

Source/platform/exported/WebPushSubscription.cpp

Index: Source/platform/exported/WebPushSubscription.cpp
diff --git a/Source/platform/exported/WebPushSubscription.cpp b/Source/platform/exported/WebPushSubscription.cpp
deleted file mode 100644
index 49c7466b16a9af36008a9de2287bd5cf5eb6c70e..0000000000000000000000000000000000000000
--- a/Source/platform/exported/WebPushSubscription.cpp
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2015 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 "config.h"
-#include "public/platform/modules/push_messaging/WebPushSubscription.h"
-
-#include "platform/weborigin/KURL.h"
-#include "wtf/text/WTFString.h"
-
-namespace blink {
-
-WebPushSubscription::WebPushSubscription(const WebString& endpointWithoutSubscriptionId, const WebString& subscriptionId)
-{
-    String concatenatedEndpoint = endpointWithoutSubscriptionId;
-    concatenatedEndpoint.append("/");
-    concatenatedEndpoint.append(subscriptionId);
-
-    endpoint = KURL(ParsedURLString, concatenatedEndpoint);
-}
-
-} // namespace blink