Developer Guides: Remove monerorpc repo

https://www.getmonero.org/resources/developer-guides/

[monerorpc](https://github.com/00-matt/monerorpc) - A Java interface for Monero wallet and daemon RPC. Is now gone. [Archive](https://web.archive.org/web/20230307032534/https://github.com/00-matt/monerorpc).

Remove it and keep https://github.com/woodser/monero-java only for Java section? 