Disabled thread-ring in the harness, since it calls exit and doesn't

display its running time.

collects/tests/racket/benchmarks/shootout/auto.rkt

@@ -149,7 +149,7 @@ exec racket -qu "$0" ${1+"$@"}
       spectralnorm-unsafe
       strcat
       sumcol
-      thread-ring
+      ;; thread-ring ; calls exit, so won't display running time
       wc
       wordfreq))
 

collects/tests/racket/benchmarks/shootout/run.rkt

@@ -51,7 +51,7 @@
       ("spectralnorm-unsafe" "1000")
       ("strcat" "50000000")
       ("sumcol" #f ,(lambda () (mk-sumcol-input)))
-      ("thread-ring" "1000000")
+      ("thread-ring" "1000000") ; calls exit, so won't display running time
       ("wc" #f ,(lambda () (mk-wc-input)))
       ("wordfreq" #f ,(lambda () (mk-wordfreq-input)))
       ))