DEV: Remove Redis noop logging.

When Redis drops into readonly mode, it floods the log. The log isn't
actionable and we have other means of knowing that an app is in readonly
mode.

lib/discourse_redis.rb

@@ -172,10 +172,6 @@ class DiscourseRedis
     yield
   rescue Redis::CommandError => ex
     if ex.message =~ /READONLY/
-      unless Discourse.recently_readonly? || Rails.env.test?
-        STDERR.puts "WARN: Redis is in a readonly state. Performed a noop"
-      end
-
       if !ENV["REDIS_RAILS_FAILOVER"]
         fallback_handler.verify_master if !fallback_handler.master
       end