[fuchsia] Remove stub fidl_library.gni.

Bug: 1050703
Change-Id: I09b9c20f631a6dda0a424790ac7f55ada0f144d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2056947
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747342}

base/BUILD.gn

@@ -94,7 +94,7 @@ if (is_android) {
 }
 
 if (is_fuchsia) {
-  import("//build/config/fuchsia/fidl_library.gni")
+  import("//third_party/fuchsia-sdk/sdk/build/fidl_library.gni")
 }
 
 config("base_flags") {

build/config/fuchsia/fidl_library.gni

-# Copyright 2018 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.
-
-assert(is_fuchsia)
-
-import("//third_party/fuchsia-sdk/sdk/build/fidl_library.gni")