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diff --git a/src/tac2expr.mli b/src/tac2expr.mli
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@@ -1,190 +0,0 @@
-(************************************************************************)
-(*  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 Names
-open Libnames
-
-type mutable_flag = bool
-type rec_flag = bool
-type redef_flag = bool
-type lid = Id.t
-type uid = Id.t
-
-type ltac_constant = KerName.t
-type ltac_alias = KerName.t
-type ltac_constructor = KerName.t
-type ltac_projection = KerName.t
-type type_constant = KerName.t
-
-type tacref =
-| TacConstant of ltac_constant
-| TacAlias of ltac_alias
-
-type 'a or_relid =
-| RelId of qualid
-| AbsKn of 'a
-
-(** {5 Misc} *)
-
-type ml_tactic_name = {
-  mltac_plugin : string;
-  mltac_tactic : string;
-}
-
-type 'a or_tuple =
-| Tuple of int
-| Other of 'a
-
-(** {5 Type syntax} *)
-
-type raw_typexpr_r =
-| CTypVar of Name.t
-| CTypArrow of raw_typexpr * raw_typexpr
-| CTypRef of type_constant or_tuple or_relid * raw_typexpr list
-
-and raw_typexpr = raw_typexpr_r CAst.t
-
-type raw_typedef =
-| CTydDef of raw_typexpr option
-| CTydAlg of (uid * raw_typexpr list) list
-| CTydRec of (lid * mutable_flag * raw_typexpr) list
-| CTydOpn
-
-type 'a glb_typexpr =
-| GTypVar of 'a
-| GTypArrow of 'a glb_typexpr * 'a glb_typexpr
-| GTypRef of type_constant or_tuple * 'a glb_typexpr list
-
-type glb_alg_type = {
-  galg_constructors : (uid * int glb_typexpr list) list;
-  (** Constructors of the algebraic type *)
-  galg_nconst : int;
-  (** Number of constant constructors *)
-  galg_nnonconst : int;
-  (** Number of non-constant constructors *)
-}
-
-type glb_typedef =
-| GTydDef of int glb_typexpr option
-| GTydAlg of glb_alg_type
-| GTydRec of (lid * mutable_flag * int glb_typexpr) list
-| GTydOpn
-
-type type_scheme = int * int glb_typexpr
-
-type raw_quant_typedef = Names.lident list * raw_typedef
-type glb_quant_typedef = int * glb_typedef
-
-(** {5 Term syntax} *)
-
-type atom =
-| AtmInt of int
-| AtmStr of string
-
-(** Tactic expressions *)
-type raw_patexpr_r =
-| CPatVar of Name.t
-| CPatRef of ltac_constructor or_tuple or_relid * raw_patexpr list
-| CPatCnv of raw_patexpr * raw_typexpr
-
-and raw_patexpr = raw_patexpr_r CAst.t
-
-type raw_tacexpr_r =
-| CTacAtm of atom
-| CTacRef of tacref or_relid
-| CTacCst of ltac_constructor or_tuple or_relid
-| CTacFun of raw_patexpr list * raw_tacexpr
-| CTacApp of raw_tacexpr * raw_tacexpr list
-| CTacLet of rec_flag * (raw_patexpr * raw_tacexpr) list * raw_tacexpr
-| CTacCnv of raw_tacexpr * raw_typexpr
-| CTacSeq of raw_tacexpr * raw_tacexpr
-| CTacCse of raw_tacexpr * raw_taccase list
-| CTacRec of raw_recexpr
-| CTacPrj of raw_tacexpr * ltac_projection or_relid
-| CTacSet of raw_tacexpr * ltac_projection or_relid * raw_tacexpr
-| CTacExt : ('a, _) Tac2dyn.Arg.tag * 'a -> raw_tacexpr_r
-
-and raw_tacexpr = raw_tacexpr_r CAst.t
-
-and raw_taccase = raw_patexpr * raw_tacexpr
-
-and raw_recexpr = (ltac_projection or_relid * raw_tacexpr) list
-
-type case_info = type_constant or_tuple
-
-type 'a open_match = {
-  opn_match : 'a;
-  opn_branch : (Name.t * Name.t array * 'a) KNmap.t;
-  (** Invariant: should not be empty *)
-  opn_default : Name.t * 'a;
-}
-
-type glb_tacexpr =
-| GTacAtm of atom
-| GTacVar of Id.t
-| GTacRef of ltac_constant
-| GTacFun of Name.t list * glb_tacexpr
-| GTacApp of glb_tacexpr * glb_tacexpr list
-| GTacLet of rec_flag * (Name.t * glb_tacexpr) list * glb_tacexpr
-| GTacCst of case_info * int * glb_tacexpr list
-| GTacCse of glb_tacexpr * case_info * glb_tacexpr array * (Name.t array * glb_tacexpr) array
-| GTacPrj of type_constant * glb_tacexpr * int
-| GTacSet of type_constant * glb_tacexpr * int * glb_tacexpr
-| GTacOpn of ltac_constructor * glb_tacexpr list
-| GTacWth of glb_tacexpr open_match
-| GTacExt : (_, 'a) Tac2dyn.Arg.tag * 'a -> glb_tacexpr
-| GTacPrm of ml_tactic_name * glb_tacexpr list
-
-(** {5 Parsing & Printing} *)
-
-type exp_level =
-| E5
-| E4
-| E3
-| E2
-| E1
-| E0
-
-type sexpr =
-| SexprStr of string CAst.t
-| SexprInt of int CAst.t
-| SexprRec of Loc.t * Id.t option CAst.t * sexpr list
-
-(** {5 Toplevel statements} *)
-
-type strexpr =
-| StrVal of mutable_flag * rec_flag * (Names.lname * raw_tacexpr) list
-  (** Term definition *)
-| StrTyp of rec_flag * (qualid * redef_flag * raw_quant_typedef) list
-  (** Type definition *)
-| StrPrm of Names.lident * raw_typexpr * ml_tactic_name
-  (** External definition *)
-| StrSyn of sexpr list * int option * raw_tacexpr
-  (** Syntactic extensions *)
-| StrMut of qualid * raw_tacexpr
-  (** Redefinition of mutable globals *)
-| StrRun of raw_tacexpr
-  (** Toplevel evaluation of an expression *)
-
-(** {5 Dynamic semantics} *)
-
-(** Values are represented in a way similar to OCaml, i.e. they constrast
-    immediate integers (integers, constructors without arguments) and structured
-    blocks (tuples, arrays, constructors with arguments), as well as a few other
-    base cases, namely closures, strings, named constructors, and dynamic type
-    coming from the Coq implementation. *)
-
-type tag = int
-
-type frame =
-| FrLtac of ltac_constant
-| FrAnon of glb_tacexpr
-| FrPrim of ml_tactic_name
-| FrExtn : ('a, 'b) Tac2dyn.Arg.tag * 'b -> frame
-
-type backtrace = frame list