FIX: Don't cleanup when initializing `Sidkiq::ProcessSet`.

FIX: Don’t cleanup when initializing Sidkiq::ProcessSet.

Cleanup tries to write to Redis which doesn’t work so well when Redis is in readonly mode.

diff --git a/lib/internal_metric/global.rb b/lib/internal_metric/global.rb
index f542368..0c83be3 100644
--- a/lib/internal_metric/global.rb
+++ b/lib/internal_metric/global.rb
@@ -98,7 +98,7 @@ module DiscoursePrometheus::InternalMetric
       hostname = ::PrometheusExporter.hostname
 
       @sidekiq_processes = 0
-      @sidekiq_workers = Sidekiq::ProcessSet.new.sum do |process|
+      @sidekiq_workers = Sidekiq::ProcessSet.new(false).sum do |process|
         if process["hostname"] == hostname
           @sidekiq_processes += 1
           process["concurrency"]

GitHub sha: 20489423