Revert of Rewrite LogDog log viewer app.

web/inc/luci-sleep-promise/promise.ts

Index: web/inc/luci-sleep-promise/promise.ts
diff --git a/web/inc/luci-sleep-promise/promise.ts b/web/inc/luci-sleep-promise/promise.ts
deleted file mode 100644
index a8221c42ee1f1923cb2c08dcecfd172ad87a8f80..0000000000000000000000000000000000000000
--- a/web/inc/luci-sleep-promise/promise.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-/*
-  Copyright 2016 The LUCI Authors. All rights reserved.
-  Use of this source code is governed under the Apache License, Version 2.0
-  that can be found in the LICENSE file.
-*/
-
-export function sleep(delay: number): Promise<void> {
-  return new Promise<void>( (resolve, reject) => {
-    window.setTimeout(resolve, delay);
-  });
-}