v-m/scrape: webistes: Stop scraping Matrix

I'm not using Matrix for anything anymore, and it seems to have gone
offline.  I haven't fully decommissioned it yet, but the Blackbox scrape
is failing, so I'll just disable that bit for now.

victoria-metrics/scrape.yml

@@ -60,7 +60,6 @@ scrape_configs:
     - http://pyrocufflink.net/
     - http://ebonfire.com/
     - http://chmod777.sh/
-    - https://hatch.chat/_matrix/client/versions
     - https://nextcloud.pyrocufflink.net/
     - https://bitwarden.pyrocufflink.blue/
     - https://git.pyrocufflink.blue/