Ticket #48779 - Remove startpidfile check in start-dirsrv
Description: Since this fix was made, startpid file is not longer
generated in the systemd start.
Ticket 47951 - Add PIDFile option to .service
commit d4deb29a2ed2c738fab41500e6c806f40c4dff17
start-dirsrv script should be updated to adjust to the fix.
https://fedorahosted.org/389/ticket/48779
Reviewed by wibrown@redhat.com (Thank you, William!!)