We don't need to filter syntax anymore as we source the META differently anyway.
We don't need to filter syntax anymore as we source the META differently anyway.

This also fix a problem when building with a library define a syntax AND
a library at the same level.

ocaml-obuild/obuild,ocaml-obuild/obuild,UnixJunkie/obuild,z4p4n/obuild,z4p4n/obuild,UnixJunkie/obuild