Revert of Reland "Move smoothing filter to common audio".

webrtc/base/analytics/BUILD.gn

Index: webrtc/base/analytics/BUILD.gn
diff --git a/webrtc/base/analytics/BUILD.gn b/webrtc/base/analytics/BUILD.gn
deleted file mode 100644
index e7e631dca6029b842a4ccf213cb53b3332de76d4..0000000000000000000000000000000000000000
--- a/webrtc/base/analytics/BUILD.gn
+++ /dev/null
@@ -1,16 +0,0 @@
-# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-#
-# Use of this source code is governed by a BSD-style license
-# that can be found in the LICENSE file in the root of the source
-# tree. An additional intellectual property rights grant can be found
-# in the file PATENTS.  All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
-
-import("../../build/webrtc.gni")
-
-rtc_static_library("rtc_analytics") {
-  sources = [
-    "exp_filter.cc",
-    "exp_filter.h",
-  ]
-}