Remove old annotated_steps buildbot scripts and dispatcher

tools/bots/steps_clank.py

Index: tools/bots/steps_clank.py
diff --git a/tools/bots/steps_clank.py b/tools/bots/steps_clank.py
deleted file mode 100755
index 1c8af346e6495547e2000c6d43b56745ff2e104d..0000000000000000000000000000000000000000
--- a/tools/bots/steps_clank.py
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/usr/bin/python
-# Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-import sys
-
-def main():
-  sys.exit(0)
-
-if __name__ == '__main__':
-  main()