Revert "[Rspamd] Respect Redis REPLICA in reputation plugin (#4046)" (#4065)

This reverts commit 7fdc4c2cc3b21f51255d209b3d2602a54e679181.

data/conf/rspamd/local.d/reputation.conf

@@ -2,7 +2,9 @@ rules {
   ip_reputation = {
     selector "ip" {
     }
-    backend "redis";
+    backend "redis" {
+      servers = "redis";
+    }
     symbol = "IP_REPUTATION";
   }
 }