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diff --git a/matita/matita/contribs/lambdadelta/basic_2/syntax/genv_weight.ma b/matita/matita/contribs/lambdadelta/basic_2/syntax/genv_weight.ma
deleted file mode 100644
index 632fdc8e5..000000000
--- a/matita/matita/contribs/lambdadelta/basic_2/syntax/genv_weight.ma
+++ /dev/null
@@ -1,30 +0,0 @@
-(**************************************************************************)
-(*       ___                                                              *)
-(*      ||M||                                                             *)
-(*      ||A||       A project by Andrea Asperti                           *)
-(*      ||T||                                                             *)
-(*      ||I||       Developers:                                           *)
-(*      ||T||         The HELM team.                                      *)
-(*      ||A||         http://helm.cs.unibo.it                             *)
-(*      \   /                                                             *)
-(*       \ /        This file is distributed under the terms of the       *)
-(*        v         GNU General Public License Version 2                  *)
-(*                                                                        *)
-(**************************************************************************)
-
-include "basic_2/syntax/term_weight.ma".
-include "basic_2/syntax/genv.ma".
-
-(* WEIGHT OF A GLOBAL ENVIRONMENT *******************************************)
-
-rec definition gw G ≝ match G with
-[ GAtom       ⇒ 0
-| GPair G I T ⇒ gw G + ♯{T}
-].
-
-interpretation "weight (global environment)" 'Weight G = (gw G).
-
-(* Basic properties *********************************************************)
-
-lemma gw_pair: ∀I,G,T. ♯{G} < ♯{G.ⓑ{I}T}.
-normalize /2 width=1 by monotonic_le_plus_r/ qed.