Remove unused nsinit salt state

cluster/saltbase/salt/nsinit/init.sls

@@ -1,11 +0,0 @@
-{% if grains['os_family'] != 'RedHat' %}
-build-essential:
-  pkg:
-    - installed
-{% endif %}
-
-nsinit:
-  cmd.script:
-    - user: root
-    - shell: /bin/bash
-    - source: salt://nsinit/install.sh

cluster/saltbase/salt/nsinit/install.sh

@@ -1,22 +0,0 @@
-#!/bin/bash
-
-# Copyright 2014 Google Inc. 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.
-
-export GOPATH=/var/nsinit
-mkdir -p $GOPATH
-go get github.com/docker/docker/vendor/src/github.com/docker/libcontainer/nsinit
-if [ ! -e /usr/sbin/nsinit ]; then
-  ln -s /var/nsinit/bin/nsinit /usr/sbin/nsinit
-fi