Remove BrowserVersion.java.

BrowserVersion's functionality has been supplanted by ChromeVersionInfo.

Review URL: https://codereview.chromium.org/637283003

Cr-Commit-Position: refs/heads/master@{#299430}

chrome/android/java/src/org/chromium/chrome/browser/BrowserVersion.java

-// Copyright 2014 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.
-
-package org.chromium.chrome.browser;
-
-/**
- * TODO(nileshagrawal): Rename this class to something more appropriate.
- * Provides a way for java code to determine whether Chrome was built as an official build.
- */
-public class BrowserVersion {
-    /**
-     * Check if the browser was built as an "official" build.
-     *
-     * This function depends on the native library being loaded; calling it before then will crash.
-     */
-    public static boolean isOfficialBuild() {
-        return ChromeVersionConstants.IS_OFFICIAL_BUILD;
-    }
-}