Remove duplicate trial success banner copy

ee/app/views/shared/billings/_billing_plan_header.html.haml

 - parent_group = local_assigns[:parent_group]
-- features_link = link_to s_("BillingPlans|features"), "https://about.gitlab.com/features", rel: "noreferrer noopener"
 
 .mb-2= render_billings_gold_trial(current_user, parent_group || namespace)
 
@@ -13,8 +12,6 @@
       .user-callout-copy
         %h4
           = s_("BillingPlans|Congratulations, your new trial is activated")
-        %p
-          = s_("BillingPlans|Your Gold trial will <strong>expire after %{expiration_date}</strong>. You can learn more about GitLab.com Gold by reading about our %{features_link}.").html_safe % { expiration_date: namespace.trial_ends_on, features_link: features_link }
 
 .billing-plan-header.content-block.center
   .billing-plan-logo

locale/gitlab.pot

@@ -2323,9 +2323,6 @@ msgstr ""
 msgid "BillingPlans|Your GitLab.com trial will <strong>expire after %{expiration_date}</strong>. You can learn more about GitLab.com Gold by reading about our %{features_link}."
 msgstr ""
 
-msgid "BillingPlans|Your Gold trial will <strong>expire after %{expiration_date}</strong>. You can learn more about GitLab.com Gold by reading about our %{features_link}."
-msgstr ""
-
 msgid "BillingPlans|features"
 msgstr ""