Cleanup unused variables

Every 5 minutes receive the following PHP notice in the /var/log/everything.log file from two undefined variables being called on

Jul  6 20:20:02 minepeon CROND[3152]: (minepeon) CMDOUT (PHP Notice:  Undefined variable: t in /opt/minepeon/etc/cron.d/5min/temp on line 45)
Jul  6 20:20:02 minepeon CROND[3152]: (minepeon) CMDOUT (PHP Notice:  Undefined variable: tz in /opt/minepeon/etc/cron.d/5min/temp on line 46)