Log cron_jobs configuration instead of raising exception

CHANGELOG

@@ -127,7 +127,7 @@ v 8.10.0 (unreleased)
   - Fix last update timestamp on issues not preserved on gitlab.com and project imports
   - Fix issues importing projects from EE to CE
   - Fix creating group with space in group path
-  - Improve cron_jobs loading error messages !5318
+  - Improve cron_jobs loading error messages !5318 / !5360
   - Create Todos for Issue author when assign or mention himself (Katarzyna Kobierska)
   - Limit the number of retries on error to 3 for exporting projects
   - Allow empty repositories on project import/export

config/initializers/sidekiq.rb

@@ -18,7 +18,8 @@ Sidekiq.configure_server do |config|
     if cron_jobs[k] && cron_jobs_required_keys.all? { |s| cron_jobs[k].key?(s) }
       cron_jobs[k]['class'] = cron_jobs[k].delete('job_class')
     else
-      raise("Invalid cron_jobs config key: '#{k}'. Check your gitlab config file.")
+      cron_jobs.delete(k)
+      Rails.logger.error("Invalid cron_jobs config key: '#{k}'. Check your gitlab config file.")
     end
   end
   Sidekiq::Cron::Job.load_from_hash! cron_jobs