Remove final mentions of the LUA script

This also means we need to change the basic 'is this thing on?' connection check.  PING is the usual suspect.  Note that this is *not* an 'adminstrative' command in the context of 'redis-namespace', so we can go direct to 'conn' and remove the scary comment

Gemfile.lock

 PATH
   remote: .
   specs:
-    gitlab-exporter (11.0.0)
+    gitlab-exporter (11.0.1)
       connection_pool (= 2.2.5)
       pg (= 1.2.3)
       puma (= 5.3.2)

lib/gitlab_exporter/sidekiq.rb

@@ -189,14 +189,9 @@ module GitLab
       def connected?
         return @connected unless @connected.nil?
 
-        # This is also a good "connected check"
         Sidekiq.redis do |conn|
-          # Using administrative commands on conn directly (which is a Redis::Namespace)
-          # will be removed in redis-namespace 2.0.
-          conn.redis.script(:load, QUEUE_JOB_STATS_SCRIPT) unless conn.redis.script(:exists, QUEUE_JOB_STATS_SHA)
+          @connected = (conn.ping == "PONG")
         end
-
-        @connected = true
       rescue Redis::BaseConnectionError => e
         @logger&.error "Error connecting to the Redis: #{e}"
         @connected = false

lib/gitlab_exporter/version.rb

 module GitLab
   module Exporter
-    VERSION = "11.0.0".freeze
+    VERSION = "11.0.1".freeze
   end
 end