removed storage option

-> somtimes there are corrupted backups with btfs

lxc_backup.sh

@@ -23,7 +23,7 @@ fi
 for container in $(${lxccmd} list --format csv -c n | grep -v backup| grep -v "^oo" | grep -v test);
 do 
 	${lxccmd} copy ${container} ${container}-backup
-	${lxccmd} export ${container}-backup ${backuppath}$(date +%Y_%m_%d)-lxc-${container}.tar.gz --optimized-storage
+	${lxccmd} export ${container}-backup ${backuppath}$(date +%Y_%m_%d)-lxc-${container}.tar.gz
 	${lxccmd} delete ${container}-backup
 done