Banish Redis support to the shadow realm.

Nobody actually uses this and it hasn't been tested in years so it
a massive pain to maintain. It may be replaced with an alternate
NoSQL database such as MongoDB in the future.

data/modules.example.conf

@@ -374,30 +374,6 @@ module { name = "help" }
 	}
 }
 
-/*
- * redis
- *
- * This module allows other modules to use Redis.
- */
-#module
-{
-	name = "redis"
-
-	/* A redis database */
-	redis
-	{
-		/* The name of this service */
-		name = "redis/main"
-
-		/*
-		 * The redis database to use. New connections default to 0.
-		 */
-		db = 0
-
-		ip = "127.0.0.1"
-		port = 6379
-	}
-}
 
 /*
  * [EXTRA] regex_pcre2