Remove old APIs from components/task_scheduler_util/.

components/task_scheduler_util/variations/BUILD.gn

Index: components/task_scheduler_util/variations/BUILD.gn
diff --git a/components/task_scheduler_util/variations/BUILD.gn b/components/task_scheduler_util/variations/BUILD.gn
deleted file mode 100644
index 5d667105af8320054f28789645ec52462757dcba..0000000000000000000000000000000000000000
--- a/components/task_scheduler_util/variations/BUILD.gn
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2016 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("variations") {
-  sources = [
-    "browser_variations_util.cc",
-    "browser_variations_util.h",
-  ]
-
-  deps = [
-    "//base",
-    "//components/task_scheduler_util/browser",
-  ]
-}
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "browser_variations_util_unittest.cc",
-  ]
-  deps = [
-    ":variations",
-    "//base",
-    "//components/variations",
-    "//testing/gtest",
-  ]
-}