# File lib/god/conditions/process_exits.rb, line 49
      def deregister
        if File.exist?(self.watch.pid_file)
          pid = File.read(self.watch.pid_file).strip.to_i
          EventHandler.deregister(pid, :proc_exit)
        else
          applog(self.watch, :error, "#{self.watch.name} could not deregister: no such PID file #{self.watch.pid_file} (#{self.base_name})")
        end
      end