Remove ml lexer.

Author: cristianoc

jscomp/ml/cmt_format.ml

@@ -188,7 +188,7 @@ let save_cmt filename modname binary_annots sourcefile initial_env cmi =
            cmt_modname = modname;
            cmt_annots = clear_env binary_annots;
            cmt_value_dependencies = !value_deps;
-           cmt_comments = Lexer.comments ();
+           cmt_comments = [];
            cmt_args = Sys.argv;
            cmt_sourcefile = sourcefile;
            cmt_builddir =  Sys.getcwd ();

jscomp/ml/dune

@@ -7,5 +7,3 @@
  (flags
   (:standard -w +a-4-42-40-41-44-45-9-48-67-70))
  (libraries ext js_parser))
-
-(ocamllex lexer)