Remove https://teddit.alefvanoon.xyz from instance list

The instance (and https://alefvanoon.xyz in general) doesn't work
anymore. https://github.com/alefvanoon/services.alefvanoon.xyz and
https://github.com/alefvanoon/alefvanoon.xyz are both archived, so it's
likely alefvanoon took the website down.

README.md

@@ -33,7 +33,6 @@ Community instances:
 | [snoo.ioens.is](https://snoo.ioens.is) | [snoo.ioensistjs7wd746...onion](http://snoo.ioensistjs7wd746zluwixvojbbkxhr37lepdvwtdfeav673o64iflqd.onion/) |  | |
 | [teddit.httpjames.space](https://teddit.httpjames.space) |  |  | |
 |  | [ibarajztopxnuhabfu7f...onion](http://ibarajztopxnuhabfu7fg6gbudynxofbnmvis3ltj6lfx47b6fhrd5qd.onion) | [xugoqcf2pftm76vbznx4...i2p](http://xugoqcf2pftm76vbznx4xuhrzyb5b6zwpizpnw2hysexjdn5l2tq.b32.i2p) | Operated by [mdleom.com](https://mdleom.com/about/#Services) |
-| [teddit.alefvanoon.xyz](https://teddit.alefvanoon.xyz) |  |  | |
 | [incogsnoo.com](https://incogsnoo.com) | [tedditfyn6idalzso5wam....onion](tedditfyn6idalzso5wam5qd3kdtxoljjhbrbbx34q2xkcisvshuytad.onion/) | [http://teddit.i2p](http://teddit.i2p) | |
 | [teddit.pussthecat.org](https://teddit.pussthecat.org) |  |  | Operated by [PussTheCat.org](https://pussthecat.org/) |
 | [reddit.lol](https://reddit.lol) | [http://dawtyi5e2cfyfmoht...onion](http://dawtyi5e2cfyfmoht4izmczi42aa2zwh6wi34zwvc6rzf2acpxhrcrad.onion) | [http://vzeiwzi7ogwl3i...b32.i2p](vzeiwzi7ogwl3ijrfek4fbtwhvamxcpyqoc3s4vcgnhlp54s5clq.b32.i2p) | Operated by https://liberta.casa | |

instances.json

@@ -33,9 +33,6 @@
     "i2p": "http://xugoqcf2pftm76vbznx4xuhrzyb5b6zwpizpnw2hysexjdn5l2tq.b32.i2p",
     "notes": "Operated by mdleom.com"
   },
-  {
-    "url": "https://teddit.alefvanoon.xyz"
-  },
   {
     "url": "https://incogsnoo.com",
     "onion": "http://tedditfyn6idalzso5wam5qd3kdtxoljjhbrbbx34q2xkcisvshuytad.onion",