go1.23: 76-time-after no longer relevant

[jmcmullan]

As of Go 1.23, garbage collection of time.After() has improved, as per go1.23 doc time.After.

package time // import "time"

func After(d Duration) <-chan Time
    After waits for the duration to elapse and then sends the current time on
    the returned channel. It is equivalent to NewTimer(d).C.

    Before Go 1.23, this documentation warned that the underlying Timer
    would not be recovered by the garbage collector until the timer fired,
    and that if efficiency was a concern, code should use NewTimer instead and
    call Timer.Stop if the timer is no longer needed. As of Go 1.23, the garbage
    collector can recover unreferenced, unstopped timers. There is no reason to
    prefer NewTimer when After will do.