Delete update_piptool.sh (#3)
I'd meant to clean this up when I renamed this update_tools.sh, but clearly missed it.
diff --git a/update_piptool.sh b/update_piptool.sh
deleted file mode 100755
index 7eb8450..0000000
--- a/update_piptool.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/bash
-
-# Copyright 2017 The Bazel Authors. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -euo pipefail
-
-bazel build //rules_python:piptool.par
-cp bazel-bin/rules_python/piptool.par tools/piptool.par
