Remove WATCHLISTS.

I was the only one left :)

TBR=ehmaldonado@chromium.org

Change-Id: I66893b6de9231e09ef3a10cf0b02c8836d1ad012
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1713221
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

WATCHLISTS

@@ -1,26 +0,0 @@
-# Copyright (c) 2012 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.
-
-# Watchlist Rules
-# Refer: http://dev.chromium.org/developers/contributing-code/watchlists
-
-{
-
-  'WATCHLIST_DEFINITIONS': {
-    'this_file': {
-      'filepath': '^WATCHLISTS$',
-    },
-    'depot_tools': {
-      'filepath': '.+',
-    },
-  },
-
-  'WATCHLISTS': {
-    'this_file': [],
-    'depot_tools': [
-      'iannucci+depot_tools@chromium.org',
-    ],
-  },
-
-}