doc: remove dchat from summary

temporarily remove dchat from the visibly accessible docs as it needs to
be ported over to the new network code. dnetview usage will also change
with the new release, so we are just disabling the tutorial for now.

doc/src/SUMMARY.md

@@ -51,32 +51,6 @@
   - [Research](crypto/research.md)
   - [Rate-Limit Nullifiers](crypto/rln.md)
   - [Reading maths books](crypto/reading-maths-books.md)
-- [P2P API Tutorial](learn/dchat/dchat.md)
-  - [Deployment](learn/dchat/deployment/part-1.md)
-    - [Getting started](learn/dchat/deployment/getting-started.md)
-    - [Writing a daemon](learn/dchat/deployment/writing-a-daemon.md)
-    - [Sessions](learn/dchat/deployment/sessions.md)
-    - [Settings](learn/dchat/deployment/settings.md)
-    - [Error handling](learn/dchat/deployment/error-handling.md)
-    - [Start-Run-Stop](learn/dchat/deployment/start-run-stop.md)
-    - [Seed](learn/dchat/deployment/seed-node.md)
-    - [Deploy](learn/dchat/deployment/deploy.md)
-  - [Creating dchat](learn/dchat/creating-dchat/part-2.md)
-    - [Message](learn/dchat/creating-dchat/message.md)
-    - [Understanding Protocols](learn/dchat/creating-dchat/protocols.md)
-    - [ProtocolDchat](learn/dchat/creating-dchat/protocol-dchat.md)
-    - [Register protocol](learn/dchat/creating-dchat/register-protocol.md)
-    - [Sending messages](learn/dchat/creating-dchat/sending-messages.md)
-    - [Slap on a UI](learn/dchat/creating-dchat/ui.md)
-    - [Using dchat](learn/dchat/creating-dchat/using-dchat.md)
-  - [Net tools](learn/dchat/network-tools/part-3.md)
-    - [RPC interface](learn/dchat/network-tools/rpc.md)
-    - [Accept addr](learn/dchat/network-tools/accept-addr.md)
-    - [Adding methods](learn/dchat/network-tools/pong.md)
-    - [RPC server](learn/dchat/network-tools/server.md)
-    - [get_info](learn/dchat/network-tools/get-info.md)
-    - [Using dnetview](learn/dchat/network-tools/using-dnetview.md)
-    - [Debugging](learn/dchat/network-tools/debug.md)
 - [Miscellaneous tools](misc/misc.md)
   - [vanityaddr](misc/vanityaddr.md)
   - [darkirc](misc/ircd/ircd.md)