Remove unused translation

Remove unused translation

It isn’t used anymore since a19e43fd3b83f9e2be632edaf69cc4ce01fe787b

diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 64ed44d..51daf79 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -1375,7 +1375,6 @@ en:
   dashboard:
     rails_env_warning: "Your server is running in %{env} mode."
     host_names_warning: "Your config/database.yml file is using the default localhost hostname. Update it to use your site's hostname."
-    gc_warning: 'Your server is using default ruby garbage collection parameters, which will not give you the best performance. Read this topic on performance tuning: <a href="https://meta.discourse.org/t/tuning-ruby-and-rails-for-discourse/4126" target="_blank">Tuning Ruby and Rails for Discourse</a>.'
     sidekiq_warning: 'Sidekiq is not running. Many tasks, like sending emails, are executed asynchronously by sidekiq. Please ensure at least one sidekiq process is running. <a href="https://github.com/mperham/sidekiq" target="_blank">Learn about Sidekiq here</a>.'
     queue_size_warning: "The number of queued jobs is %{queue_size}, which is high. This could indicate a problem with the Sidekiq process(es), or you may need to add more Sidekiq workers."
     memory_warning: "Your server is running with less than 1 GB of total memory. At least 1 GB of memory is recommended."

GitHub sha: 3e3ac704