Revert of Add more components tests to GN build.

components/visitedlink/test/BUILD.gn

Index: components/visitedlink/test/BUILD.gn
diff --git a/components/visitedlink/test/BUILD.gn b/components/visitedlink/test/BUILD.gn
deleted file mode 100644
index 3f7d7424ded1ed00869548a831396e71ae135362..0000000000000000000000000000000000000000
--- a/components/visitedlink/test/BUILD.gn
+++ /dev/null
@@ -1,16 +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.
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "visitedlink_unittest.cc",
-  ]
-  deps = [
-    "//components/visitedlink/browser",
-    "//components/visitedlink/renderer",
-    "//content/test:test_support",
-    "//testing/gtest",
-  ]
-}