Remove unnecessary sleep from init script restart

Today when restarting Elasticsearch using the start-stop-daemon on
Debian-based systems using System V init, we sleep for one second
between the process successfully stopping and starting the process
again. This sleep is unnecessary as the stop function retries forever
until the previous instance successfully terminates. This commit removes
that unncessary sleep.

Relates #17966

distribution/deb/src/main/packaging/init.d/elasticsearch

@@ -2,13 +2,6 @@
 #
 # /etc/init.d/elasticsearch -- startup script for Elasticsearch
 #
-# Written by Miquel van Smoorenburg <miquels@cistron.nl>.
-# Modified for Debian GNU/Linux	by Ian Murdock <imurdock@gnu.ai.mit.edu>.
-# Modified for Tomcat by Stefan Gybas <sgybas@debian.org>.
-# Modified for Tomcat6 by Thierry Carrez <thierry.carrez@ubuntu.com>.
-# Additional improvements by Jason Brittain <jason.brittain@mulesoft.com>.
-# Modified by Nicolas Huray for Elasticsearch <nicolas.huray@gmail.com>.
-#
 ### BEGIN INIT INFO
 # Provides:          elasticsearch
 # Required-Start:    $network $remote_fs $named
@@ -193,7 +186,6 @@ case "$1" in
   restart|force-reload)
 	if [ -f "$PID_FILE" ]; then
 		$0 stop
-		sleep 1
 	fi
 	$0 start
 	;;