Removed an undeclared dependency of MenhirSdk on Unix.

CHANGES.md

 # Changes
 
+## 2017/06/07
+
+* Removed an undeclared dependency of MenhirSdk on Unix. (Reported and fixed
+  by Frédéric Bour.)
+
 ## 2017/05/09
 
 * Menhir now always places OCaml line number directives in the generated `.ml`

src/cmly_read.ml

@@ -37,9 +37,13 @@ let read (ic : in_channel) : grammar =
 
 let read (filename : string) : grammar =
   let ic = open_in_bin filename in
-  IO.try_finally
-    (fun () -> read ic)
-    (fun () -> close_in_noerr ic)
+  match read ic with
+  | x ->
+      close_in_noerr ic;
+      x
+  | exception exn ->
+      close_in_noerr ic;
+      raise exn
 
 (* ------------------------------------------------------------------------ *)
 

src/menhirSdk.mlpack

 # This is the list of modules that must go into MenhirSdk.
 Keyword
-IO
 Version
 Cmly_format
 Cmly_api