dune: update menhir extension to 3.0

Signed-off-by: Sora Morimoto <[email protected]>

Author: smorimoto

compiler/lib/dune

@@ -21,7 +21,6 @@
   --table
   --external-tokens
   Js_token
-  --explain
   --unused-token
   TAnnot
   --unused-token
@@ -34,8 +33,7 @@
   T_AT))
 
 (menhir
- (modules annot_parser)
- (flags --explain))
+ (modules annot_parser))
 
 (rule
  (targets compiler_version.ml)

dune-project

@@ -1,5 +1,5 @@
 (lang dune 3.17)
-(using menhir 2.0)
+(using menhir 3.0)
 (name js_of_ocaml)
 
 (generate_opam_files true)