Remove everything but markdown from third_party

third_party/pkg/update.sh

Index: third_party/pkg/update.sh
diff --git a/third_party/pkg/update.sh b/third_party/pkg/update.sh
deleted file mode 100644
index 8cfd2d3ac5991b946d6f0dcb7af6a7c104d3614d..0000000000000000000000000000000000000000
--- a/third_party/pkg/update.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2014, 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.
-
-# bail on error
-set -e
-
-update() {
-  local package=$1
-  local clone_url=$2
-  local branch=$3
-
-  echo "*** Deleting old version"
-  rm -rf ${package}
-
-  echo "*** Syncing code"
-  git clone ${clone_url} ${package}
-
-  pushd $1 > /dev/null
-  if [[ $# -eq 3 ]]; then
-    git checkout ${branch}
-  fi
-
-  echo `git rev-parse HEAD` >> REVISION
-
-  rm -rf .git
-
-  popd > /dev/null
-}