diff --git a/networks.rkt b/networks.rkt
index 951a4b8..0be4950 100644
--- a/networks.rkt
+++ b/networks.rkt
@@ -26,7 +26,6 @@
                [make-state (-> (listof (cons/c symbol? any/c)) state?)]
                [make-state-booleanize (-> (listof (cons/c symbol? (or/c 0 1))) state?)]
                [booleanize-state (-> state? state?)]
-               [make-network-from-functions (-> (listof (cons/c symbol? update-function/c)) network?)]
                [update-function-form->update-function (-> update-function-form? update-function/c)]
                [network-form->network (-> network-form? network?)]
                [make-network-from-forms (-> (listof (cons/c symbol? update-function-form?))
@@ -228,9 +227,6 @@
 (define (booleanize-state s)
   (for/hash ([(x val) s]) (match val [0 (values x #f)] [1 (values x #t)])))
 
-;;; A version of make-immutable-hash restricted to creating networks.
-(define (make-network-from-functions funcs) (make-immutable-hash funcs))
-
 
 ;;; =================================
 ;;; Syntactic description of networks