Fix rubocop warning

app/controllers/voucher_adjustments_controller.rb

@@ -47,9 +47,7 @@ class VoucherAdjustmentsController < BaseController
       return false
     end
 
-    # Clear payments and payment_fee, to not affect voucher adjustment calculation
-    @order.all_adjustments.payment_fee.destroy_all
-    @order.payments.clear
+    clear_payments
 
     VoucherAdjustmentsService.new(@order).update
     @order.update_totals_and_states
@@ -81,4 +79,10 @@ class VoucherAdjustmentsController < BaseController
   def voucher_params
     params.require(:order).permit(:voucher_code)
   end
+
+  # Clear payments and payment fees, to not affect voucher adjustment calculation
+  def clear_payments
+    @order.all_adjustments.payment_fee.destroy_all
+    @order.payments.clear
+  end
 end

spec/requests/voucher_adjustments_spec.rb

@@ -67,9 +67,7 @@ describe VoucherAdjustmentsController, type: :request do
 
     context "when the order has a payment and payment feed" do
       let(:payment_method) { create(:payment_method, calculator: calculator) }
-      let(:calculator) do
-        ::Calculator::FlatPercentItemTotal.new(preferred_flat_percent: 10)
-      end
+      let(:calculator) { Calculator::FlatPercentItemTotal.new(preferred_flat_percent: 10) }
 
       before do
         create(:payment, order: order, payment_method: payment_method, amount: order.total)