Changes to user email confirmation translations
Changes to user email confirmation translations

- Remove unused messages in log_in + sign_up
- Reuse core.ref.confirmation_email_sent

ogioncz/flarum-ext-czech,gtugablue/flarum-ext-portuguese,flarum/english,balkanje/flarum-ext-bosnian1,FlarumChina/flarum-ext-simplified-chinese-pro,ogioncz/flarum-ext-czech,pladask/flarum-ext-norwegian-nynorsk,pladask/flarum-ext-norwegian-nynorsk,raweba/flarum-ext-danish,pladask/flarum-ext-norwegian-bokmal,flarum/flarum-ext-english,pladask/flarum-ext-norwegian-bokmal,FlarumChina/flarum-ext-simplified-chinese-pro