Don't remove groups/users in Debian postrm (#7817)

contrib/debian/netdata.postrm

@@ -1,4 +1,4 @@
-#! /bin/sh
+#!/bin/sh
 
 set -e
 
@@ -16,8 +16,7 @@ dpkg-maintscript-helper dir_to_symlink \
   /var/lib/netdata/www/static /usr/share/netdata/www/static 1.18.1~ netdata -- "$@"
 
 case "$1" in
-	remove)
-		;;
+  remove) ;;
 
   purge)
     if dpkg-statoverride --list | grep -qw /var/cache/netdata; then
@@ -35,26 +34,10 @@ case "$1" in
     if dpkg-statoverride --list | grep -qw /var/lib/netdata; then
       dpkg-statoverride --remove /var/lib/netdata
     fi
-
-		if getent passwd netdata >/dev/null; then
-			if [ -x /usr/sbin/deluser ]; then
-				deluser --quiet --system netdata || echo "Unable to remove netdata user"
-			fi
-		fi
-
-		if getent group netdata >/dev/null; then
-			if [ -x /usr/sbin/delgroup ]; then
-				delgroup --quiet --system netdata || echo "Unable to remove netdata group"
-			fi
-		fi
-
     ;;
 
-	*)
-		;;
+  *) ;;
+
 esac
 
-#DEBHELPER#
-
 exit 0
-