Deprecate services for http://sep24.stellar.org/

[shanzzam]

What problem does your feature solve?

New client for testing SEP-24 is now found at https://github.com/stellar/stellar-demo-wallet
demo-wallet.stellar.org is active and replaces the http://sep24.stellar.org/ client.

What would you like to see?

Remove running services for http://sep24.stellar.org/ after we do the redirect work. Will update this issue when the redirect work is complete.