chore: Add fail safes for Redis connections (#2016)

config/initializers/redis.rb

@@ -4,7 +4,3 @@ redis = Rails.env.test? ? MockRedis.new : Redis.new(Redis::Config.app)
 # Add here as you use it for more features
 # Used for Round Robin, Conversation Emails & Online Presence
 $alfred = Redis::Namespace.new('alfred', redis: redis, warning: true)
-
-# https://github.com/mperham/sidekiq/issues/4591
-# TODO once sidekiq remove we can remove this
-Redis.exists_returns_integer = false