Remove redis-namespace gem (#34742)

app/lib/redis_connection.rb

@@ -29,12 +29,7 @@ class RedisConnection
   end
 
   def connection
-    namespace = config[:namespace]
-    if namespace.present?
-      Redis::Namespace.new(namespace, redis: raw_connection)
-    else
-      raw_connection
-    end
+    raw_connection
   end
 
   private