Unplugged AST2 and Typecheck2 which are not used anymore and break the build

src/ligo/ligo-parser/.gitignore

@@ -5,3 +5,4 @@ _build/*
 */.merlin
 *.install
 /Version.ml
+/dune-project

src/ligo/ligo-parser/AST2.ml

@@ -1,3 +1,5 @@
+(*
+
 [@@@warning "-30"]
 
 module I = AST
@@ -793,3 +795,5 @@ let s_ast (ast : I.ast) : O.ast =
 (* and s_terminator = function *)
 (*   Some semi -> s_token semi ";" *)
 (* | None -> () *)
+
+ *)

src/ligo/ligo-parser/Typecheck2.ml

@@ -1,3 +1,4 @@
+(*
 [@@@warning "-27"] (* TODO *)
 [@@@warning "-32"] (* TODO *)
 [@@@warning "-30"]
@@ -272,3 +273,4 @@ let a_ast I.{types; storage_decl; declarations; orig} =
   O.{types; storage_decl; declarations; orig}
 
 let annotate : I.ast -> O.ast = a_ast
+*)

src/ligo/ligo-parser/Typecheck2.mli

@@ -1,3 +1,4 @@
+(*
 [@@@warning "-30"]
 
 module SMap : Map.S with type key = string
@@ -106,3 +107,4 @@ module O : sig
 end
 
 val annotate : I.ast -> O.ast
+*)

src/ligo/ligo-parser/dune-project

@@ -1,2 +0,0 @@
-(lang dune 1.7)
-(using menhir 2.0)