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diff --git a/helm/ocaml/lexicon/disambiguatePp.ml b/helm/ocaml/lexicon/disambiguatePp.ml
deleted file mode 100644
index 5f6512477..000000000
--- a/helm/ocaml/lexicon/disambiguatePp.ml
+++ /dev/null
@@ -1,53 +0,0 @@
-(* Copyright (C) 2005, HELM Team.
- * 
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- * 
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- * 
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA  02111-1307, USA.
- * 
- * For details, see the HELM World-Wide-Web page,
- * http://helm.cs.unibo.it/
- *)
-
-(* $Id$ *)
-
-open DisambiguateTypes
-
-let alias_of_domain_and_codomain_items domain_item (dsc,_) =
- match domain_item with
-    Id id -> LexiconAst.Ident_alias (id, dsc)
-  | Symbol (symb, i) -> LexiconAst.Symbol_alias (symb, i, dsc)
-  | Num i -> LexiconAst.Number_alias (i, dsc)
-
-let aliases_of_environment env =
-  Environment.fold
-    (fun domain_item codomain_item acc ->
-      alias_of_domain_and_codomain_items domain_item codomain_item::acc
-    ) env []
-
-let aliases_of_domain_and_codomain_items_list l =
-  List.fold_left
-    (fun acc (domain_item,codomain_item) ->
-      alias_of_domain_and_codomain_items domain_item codomain_item::acc
-    ) [] l
-
-let pp_environment env =
-  let aliases = aliases_of_environment env in
-  let strings =
-    List.map (fun alias -> LexiconAstPp.pp_alias alias ^ ".") aliases
-  in
-  String.concat "\n" (List.sort compare strings)