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diff --git a/ltac/evar_tactics.ml b/ltac/evar_tactics.ml
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--- a/ltac/evar_tactics.ml
+++ /dev/null
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-(************************************************************************)
-(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
-(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016     *)
-(*   \VV/  **************************************************************)
-(*    //   *      This file is distributed under the terms of the       *)
-(*         *       GNU Lesser General Public License Version 2.1        *)
-(************************************************************************)
-
-open Util
-open CErrors
-open Evar_refiner
-open Tacmach
-open Tacexpr
-open Refiner
-open Evd
-open Locus
-open Sigma.Notations
-open Proofview.Notations
-open Context.Named.Declaration
-
-(* The instantiate tactic *)
-
-let instantiate_evar evk (ist,rawc) sigma =
-  let evi = Evd.find sigma evk in
-  let filtered = Evd.evar_filtered_env evi in
-  let constrvars = Tacinterp.extract_ltac_constr_values ist filtered in
-  let lvar = {
-    Pretyping.ltac_constrs = constrvars;
-    ltac_uconstrs = Names.Id.Map.empty;
-    ltac_idents = Names.Id.Map.empty;
-    ltac_genargs = ist.Geninterp.lfun;
-  } in
-  let sigma' = w_refine (evk,evi) (lvar ,rawc) sigma in
-  tclEVARS sigma'
-
-let instantiate_tac n c ido =
-  Proofview.V82.tactic begin fun gl ->
-  let sigma = gl.sigma in
-  let evl =
-    match ido with
-	ConclLocation () -> evar_list (pf_concl gl)
-      | HypLocation (id,hloc) ->
-	  let decl = Environ.lookup_named_val id (Goal.V82.hyps sigma (sig_it gl)) in
-	    match hloc with
-		InHyp ->
-		  (match decl with
-                    | LocalAssum (_,typ) -> evar_list typ
-		    | _ -> error
-			"Please be more specific: in type or value?")
-	      | InHypTypeOnly ->
-		  evar_list (get_type decl)
-	      | InHypValueOnly ->
-		  (match decl with
-		    | LocalDef (_,body,_) -> evar_list body
-		    | _ -> error "Not a defined hypothesis.") in
-  if List.length evl < n then
-    error "Not enough uninstantiated existential variables.";
-  if n <= 0 then error "Incorrect existential variable index.";
-  let evk,_ = List.nth evl (n-1) in
-  instantiate_evar evk c sigma gl
-  end
-
-let instantiate_tac_by_name id c =
-  Proofview.V82.tactic begin fun gl ->
-  let sigma = gl.sigma in
-  let evk =
-    try Evd.evar_key id sigma
-    with Not_found -> error "Unknown existential variable." in
-  instantiate_evar evk c sigma gl
-  end
-
-let let_evar name typ =
-  let src = (Loc.ghost,Evar_kinds.GoalEvar) in
-  Proofview.Goal.s_enter { s_enter = begin fun gl ->
-    let sigma = Tacmach.New.project gl in
-    let env = Proofview.Goal.env gl in
-    let sigma = ref sigma in
-    let _ = Typing.e_sort_of env sigma typ in
-    let sigma = Sigma.Unsafe.of_evar_map !sigma in
-    let id = match name with
-    | Names.Anonymous -> 
-      let id = Namegen.id_of_name_using_hdchar env typ name in
-      Namegen.next_ident_away_in_goal id (Termops.ids_of_named_context (Environ.named_context env))
-    | Names.Name id -> id
-    in
-    let Sigma (evar, sigma, p) = Evarutil.new_evar env sigma ~src ~naming:(Misctypes.IntroFresh id) typ in
-    let tac =
-      (Tactics.letin_tac None (Names.Name id) evar None Locusops.nowhere)
-    in
-    Sigma (tac, sigma, p)
-  end }