remove dead code

(it looks dead, anyway, and it _should_ be dead)

Author: rfindler

redex-examples/redex/examples/delim-cont/randomized-tests.rkt

@@ -153,8 +153,7 @@
                  (λ () (letrec ,s ,e))))])
             (if (exn:fail? previous-error)
                 (raise previous-error)
-                result))]
-    [e e]))
+                result))]))
 
 (define-runtime-module-path model-impl "model-impl.rkt")