Dead link removed

README.md

@@ -29,7 +29,6 @@ Tor users:
 
 Clearnet versions:
  - [https://xmrchain.net/](https://xmrchain.net/) - https enabled, most popular and very stable.
- - [https://monero.exan.tech/](https://monero.exan.tech/) - https enabled, custom theme.
  - [https://monerohash.com/explorer/](https://monerohash.com/explorer/) - nice looking one, https enabled.
  - [http://monerochain.com/](http://monerochain.com/) - JSON API based, multiple nodes.   
  - [https://blox.minexmr.com/](https://blox.minexmr.com/) - - https enabled.