Cleanup chrome/browser/util/android/BUILD.gn.

It has been moved to chrome/browser/util/BUILD.gn. This was a
remnant not to break downstream.

TBR=yfriedman@chromium.org

Bug: 995916
Change-Id: I52e7096d7ece8562e7e4f2771aca8db4095d3695
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1879554
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710028}

chrome/browser/util/android/BUILD.gn

-# Copyright 2019 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.
-
-import("//build/config/android/rules.gni")
-
-java_group("java") {
-  deps = [
-    "//chrome/browser/util:java",
-  ]
-}