translations: remove duplicated file for Norwegian Bokmål language and update languages
Weblate complains that there is duplicated translation for Norwegian Bokmål. While doing research, I found this site http://people.skolelinux.org/pere/blog/Spr_kkoder_for_POSIX_locale_i_Norge.html and it is suggested to use nb_NO and don't use nb.
Edited by Josef Schlehofer