* lisp/international/titdic-cnv.el: Use lexical-binding

* lisp/international/titdic-cnv.el: Use lexical-binding

(tit-process-body): Remove unused vars 'template' and 'second'.
(tsang-quick-converter): Remove unused args 'name' and 'title'.
Remove unused var 'slot'.
(tsang-b5-converter, quick-b5-converter, tsang-cns-converter)
(quick-cns-converter, py-converter, ziranma-converter)
(ctlau-converter, ctlau-gb-converter, ctlau-b5-converter):
Remove unused args 'name' and 'title'.
(miscdic-convert): Remove unused var 'dicbuf'.
Don't pass 'name' and 'title' to the conversion function.