time: stop referring to timerproc in comment

The timerproc function has been removed.

Fixes #37774

Change-Id: Ice5e1d8fec91cd6ee7f032e0d21e8315a26bc6a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/222783
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>

src/time/internal_test.go

@@ -67,12 +67,13 @@ func CheckRuntimeTimerOverflow() {
 		resetTimer(r, 0)
 	}()
 
-	// If the test fails, we will hang here until the timeout in the testing package
-	// fires, which is 10 minutes. It would be nice to catch the problem sooner,
-	// but there is no reliable way to guarantee that timerproc schedules without
-	// doing something involving timerproc itself. Previous failed attempts have
-	// tried calling runtime.Gosched and runtime.GC, but neither is reliable.
-	// So we fall back to hope: We hope we don't hang here.
+	// If the test fails, we will hang here until the timeout in the
+	// testing package fires, which is 10 minutes. It would be nice to
+	// catch the problem sooner, but there is no reliable way to guarantee
+	// that timers are run without doing something involving the scheduler.
+	// Previous failed attempts have tried calling runtime.Gosched and
+	// runtime.GC, but neither is reliable. So we fall back to hope:
+	// We hope we don't hang here.
 	<-t.C
 }