fix(cost): invoice

Author: hekike

openmeter/billing/httpdriver/invoicecost.go

@@ -14,7 +14,6 @@ import (
 	"github.com/openmeterio/openmeter/openmeter/customer"
 	"github.com/openmeterio/openmeter/openmeter/meter"
 	"github.com/openmeterio/openmeter/openmeter/streaming"
-	"github.com/openmeterio/openmeter/pkg/filter"
 	"github.com/openmeterio/openmeter/pkg/framework/commonhttp"
 	"github.com/openmeterio/openmeter/pkg/framework/transport/httptransport"
 	"github.com/openmeterio/openmeter/pkg/models"
@@ -107,12 +106,6 @@ func (h *handler) GetInvoiceLineCost() GetInvoiceLineCostHandler {
 				return GetInvoiceLineCostResponse{}, err
 			}
 
-			// Convert the feature's meter group by filters to a map of filter group by
-			meterGroupByFilters := make(map[string]filter.FilterString)
-			for k, v := range feature.MeterGroupByFilters {
-				meterGroupByFilters[k] = v
-			}
-
 			// Get the customer
 			customer, err := h.customerService.GetCustomer(ctx, customer.GetCustomerInput{
 				CustomerID: lo.ToPtr(invoice.CustomerID()),