def delete_server_subscribers(channel)
      @server.mutex.synchronize do
        (@server.subscribers[channel] || []).delete_if do |hash|
          hash[:reactor] == Actor.current
        end
      end
    end
def delete_server_subscribers(channel)
      @server.mutex.synchronize do
        (@server.subscribers[channel] || []).delete_if do |hash|
          hash[:reactor] == Actor.current
        end
      end
    end
the method will delete the reactor from the channel list on the server

 @param [String] channel

 @return [void]

 @api public