Drop altcoin pip extras, CI deps and docs; update CLAUDE.md and FORK.md

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

docs/HOWTO.rst

@@ -23,11 +23,6 @@ DB Engine        A database engine package is required; two are
                  supported (see `Database Engine`_ below).
 ================ ========================
 
-Some coins need an additional package, typically for their block hash
-functions. For example, `dash_hash`_ is required for DASH. Scrypt coins
-require a Python interpreter compiled and/or linked with OpenSSL 1.1.0
-or higher.
-
 You **must** be running a non-pruning bitcoin daemon with::
 
   txindex=1
@@ -456,6 +451,5 @@ You can then set the port as follows and advertise the service externally on the
 .. _`daemontools`: http://cr.yp.to/daemontools.html
 .. _`runit`: http://smarden.org/runit/index.html
 .. _`aiohttp`: https://pypi.python.org/pypi/aiohttp
-.. _`dash_hash`: https://pypi.python.org/pypi/dash_hash
 .. _`contrib/raspberrypi3/install_electrumx.sh`: https://github.com/spesmilo/electrumx/blob/master/contrib/raspberrypi3/install_electrumx.sh
 .. _`contrib/raspberrypi3/run_electrumx.sh`: https://github.com/spesmilo/electrumx/blob/master/contrib/raspberrypi3/run_electrumx.sh

docs/features.rst

@@ -22,7 +22,7 @@ Features
   ElectrumX will failover round-robin style if the current one fails
   for any reason.
 - Peer discovery protocol removes need for IRC
-- Coin abstraction makes compatible altcoin and testnet support easy.
+- Coin abstraction makes testnet support easy.
 
 Implementation
 ==============