Remove references to snapshots

Co-authored-by: makeasnek <[email protected]>
Co-authored-by: Gabriel Galdino <[email protected]>

Also ports latest FAQ from .us

Author: nathanielcwm

_includes/_footer.htm

@@ -63,7 +63,6 @@ <h6>Development</h6>
                         <li><a href="https://github.com/gridcoin-community/Gridcoin-Research/graphs/contributors">Core Wallet Contributors</a></li>
                         <li><a href="https://gridcoin.us/wiki/rpc.html">RPC Wiki Page</a></li>
                         <li><a href="/#section_download">Wallet Downloads</a></li>
-                        <li><a href="https://download.gridcoin.us/download/downloadstake/signed/snapshot.zip">Official Snapshot</a></li>
                     </ul>
                 </div>