mod_mam_archive: remove invalid disco#info feature The feature which was previously added to disco#info was in fact specified to be used for stream features only (see XEP-0136 section 11). Emitting it in disco#info is weird at best and breaks stuff at worst.

---
labels:
- 'Stage-Obsolete'
summary: 'Connection-level rate limiting'
superseded_by: mod_limits
...

Since Prosody 0.10, this module is [included in Prosody](https://prosody.im/doc/modules/mod_limits), you will be redirected there shortly.