util.stanza: Remove dead code
These cases are caught by `check_text(v, ..)` above. Those errors do not
contain the attribute however, which would have been nice.
The Prosody project is open to contributions (see HACKERS file), but is
maintained daily by:
- Matthew Wild (mail: matthew [at] prosody.im)
- Waqas Hussain (mail: waqas [at] prosody.im)
- Kim Alvefur (mail: zash [at] prosody.im)
You can reach us collectively by email: developers [at] prosody.im
or in realtime in the Prosody chatroom: prosody@conference.prosody.im