Remove unnecessary global explorer.

cdist/conf/explorer/su

@@ -1,35 +0,0 @@
-#!/bin/sh
-#
-# 2016 Darko Poljak (darko.poljak at gmail.com)
-#
-# This file is part of cdist.
-#
-# cdist is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# cdist is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with cdist. If not, see <http://www.gnu.org/licenses/>.
-#
-# This explorer returns script code string for running a command with su.
-# If no su is found then it returns empty string.
-# It uses two arguments, first user and the second command to run.
-# If the result string is assigned to foo it can be used in code
-# generation as:
-# echo "$foo user command"
-#
-
-which su > /dev/null 2>&1
-if [ $? -eq 0 ]
-then
-    su_func='f() { su -c "$2" $1 ; }'
-    echo "eval '${su_func}' ; f "
-else
-    echo ""
-fi