package/postgresql: remove PIDFile from .service

commit eada187e77022f0d changed the service to Type=notify.
notify units don't need a PIDFile so this can be removed.

Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/postgresql/postgresql.service

@@ -15,7 +15,6 @@ Group=postgres
 StandardOutput=syslog
 StandardError=syslog
 SyslogIdentifier=postgres
-PIDFile=/var/lib/pgsql/postmaster.pid
 
 ExecStartPre=/bin/sh -c "if [ ! -f /var/lib/pgsql/PG_VERSION ]; then /usr/bin/pg_ctl initdb -D /var/lib/pgsql; fi"
 ExecStart=/usr/bin/postgres -D /var/lib/pgsql