cancel

# File lib/webrick/utils.rb, line 231
      def cancel(thread, id)
        TimeoutMutex.synchronize{
          if ary = @timeout_info[thread]
            ary.delete_if{|info| info.object_id == id }
            if ary.empty?
              @timeout_info.delete(thread)
            end
            return true
          end
          return false
        }
      end