Remove dead code and update translations

Code not used since integration_form_refactor is removed.

app/helpers/services_helper.rb

@@ -35,19 +35,6 @@ module ServicesHelper
     "#{event}_events"
   end
 
-  def service_event_action_field_name(action)
-    "#{action}_on_event_enabled"
-  end
-
-  def event_action_title(action)
-    case action
-    when "comment"
-      s_("ProjectService|Comment")
-    else
-      action.humanize
-    end
-  end
-
   def service_save_button(disabled: false)
     button_tag(class: 'btn btn-success', type: 'submit', disabled: disabled, data: { qa_selector: 'save_changes_button' }) do
       icon('spinner spin', class: 'hidden js-btn-spinner') +

locale/gitlab.pot

@@ -18292,9 +18292,6 @@ msgstr ""
 msgid "ProjectService|%{service_title}: status on"
 msgstr ""
 
-msgid "ProjectService|Comment"
-msgstr ""
-
 msgid "ProjectService|Event will be triggered by a push to the repository"
 msgstr ""
 

spec/helpers/services_helper_spec.rb

@@ -3,11 +3,6 @@
 require 'spec_helper'
 
 RSpec.describe ServicesHelper do
-  describe 'event_action_title' do
-    it { expect(event_action_title('comment')).to eq 'Comment' }
-    it { expect(event_action_title('something')).to eq 'Something' }
-  end
-
   describe '#integration_form_data' do
     subject { helper.integration_form_data(integration) }