fix: remove 'PIDFile=' directive, remove duplicate legacy 'ExecStop=' directive

templates/etc/systemd/user/subapp.service.j2

@@ -8,7 +8,6 @@ Type=forking
 Restart=no
 Environment="PERL5LIB=/usr/local/perl/"
 ExecStart=/usr/bin/perl -I /usr/local/perl/ /usr/local/bin/subapp_bagit.pl --config-file {{ vault_subapp_vars.files.subapp.path }} --start
-ExecStop=/usr/bin/perl -I /usr/local/perl/ /usr/local/bin/subapp_bagit.pl --config-file {{ vault_subapp_vars.files.subapp.path }} --stop \;
 ExecStop=/bin/bash -c '\
     PID=$(cat /run/subapp/subapp_bagit.pid); \
     if [[ ! "$PID" =~ ^[0-9]+$ ]]; then \
@@ -32,7 +31,6 @@ User={{ vault_subapp_user }}
 Group={{ vault_subapp_group }}
 # EXAMPLE: TimeoutSec=600
 TimeoutSec=infinity
-PIDFile=/run/subapp/subapp_bagit.pid
 # DO NOT REMOVE!!! (based on SubApp Issue #68)
 # Do not kill any processes for a save shutdowns with a valid SubApp database.
 KillMode=none