# File lib/god/event_handler.rb, line 41
    def self.deregister(pid, event=nil)
      if watching_pid? pid
        running = ::Process.kill(0, pid.to_i) rescue false
        if event.nil?
          @@actions.delete(pid)
          @@handler.register_process(pid, []) if running
        else
          @@actions[pid].delete(event)
          @@handler.register_process(pid, @@actions[pid].keys) if running
        end
      end
    end