DevTools: remove devtools_discovery (merged into content).

components/devtools_discovery/BUILD.gn

Index: components/devtools_discovery/BUILD.gn
diff --git a/components/devtools_discovery/BUILD.gn b/components/devtools_discovery/BUILD.gn
deleted file mode 100644
index 12f4a657c1a92bcaf770bd85814998bd58739c6b..0000000000000000000000000000000000000000
--- a/components/devtools_discovery/BUILD.gn
+++ /dev/null
@@ -1,17 +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.
-
-static_library("devtools_discovery") {
-  sources = [
-    "devtools_discovery_manager.cc",
-    "devtools_discovery_manager.h",
-  ]
-
-  deps = [
-    "//base",
-    "//content/public/browser",
-    "//content/public/common",
-    "//url",
-  ]
-}