Change `pending_user_count` to rely only on user blocked count

app/helpers/application_settings_helper.rb

@@ -477,8 +477,6 @@ module ApplicationSettingsHelper
   end
 
   def pending_user_count
-    return 0 if Gitlab::CurrentSettings.new_user_signups_cap.blank?
-
     User.blocked_pending_approval.count
   end
 end

spec/helpers/application_settings_helper_spec.rb

@@ -271,18 +271,6 @@ RSpec.describe ApplicationSettingsHelper do
         expect(pending_user_count).to eq 1
       end
     end
-
-    context 'when the new_user_signups_cap is not present' do
-      let(:user_cap) { nil }
-
-      it { is_expected.to eq 0 }
-
-      it 'does not query users unnecessarily' do
-        expect(User).not_to receive(:blocked_pending_approval)
-
-        pending_user_count
-      end
-    end
   end
 
   describe '#sidekiq_job_limiter_modes_for_select' do