lib/virgo_conf.c: Removed call for old C write_pid function
lib/virgo_conf.c: Removed call for old C write_pid function

Caused a compilation error as that file does not exist anymore.

cp16net/virgo-base,kaustavha/rackspace-monitoring-agent,virgo-agent-toolkit/rackspace-monitoring-agent,cp16net/virgo-base,cp16net/virgo-base,christopherjwang/rackspace-monitoring-agent,cp16net/virgo-base,cp16net/virgo-base,christopherjwang/rackspace-monitoring-agent,virgo-agent-toolkit/rackspace-monitoring-agent,kaustavha/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent