* tta/C/convert/texinfo.c (txi_complete_document): remove unused
converter and element_cdt_tree_fn arguments.  Update caller.

* tta/C/main/build_perl_info.c (build_sv_options_from_options_list)
(build_sv_converter_info_from_converter_initialization_info): remove
converter argument as there should never be a converter already set in
situation where these functions are called.  Update callers.

* tta/C/texi2any.c (main), tta/perl/texi2any.pl: move converter
creation later now that there is no index sorting earlier needing a
converter anymore.

* tta/C/texi2any.c (main): error out if there is no converter
at all, a situation which should never happen if the formats table is
well done.