Remove dead projects. (#557)

Removes BitchX from the participation page and Mibbit from everywhere.

Author: SadieCat

_data/consumers.yml

@@ -4,14 +4,8 @@
 - name: mIRC
   url: https://www.mirc.com/
 
-- name: Mibbit
-  url: https://www.mibbit.com/
-
 - name: ngIRCd
   url: https://ngircd.barton.de/
 
-- name: BitchX
-  url: http://www.bitchx.com/
-
 - name: The Lounge
   url: https://thelounge.chat/

_data/sw_clients.yml

@@ -662,16 +662,6 @@
         SASL:
           - external
           - plain
-    - name: Mibbit
-      # ref: https://wiki.mibbit.com/index.php/SASL
-      #      does not send CAP LS when connecting to a server
-      link: https://www.mibbit.com
-      support:
-        stable:
-          cap-3.1:
-          sasl-3.1:
-        SASL:
-          - plain
     - name: PIRC.pl web client
       # ref: https://github.com/pirc-pl/pirc-gateway/blob/1fbe9c7269073a4d93f703e9f24f1239cfdde56c/js/gateway_cmds.js#L220-L221
       link: https://github.com/pirc-pl/pirc-gateway