[Payment Request] Selector view edit mode

ios/showcase/payments/sc_payments_selector_coordinator.mm

Index: ios/showcase/payments/sc_payments_selector_coordinator.mm
diff --git a/ios/showcase/payments/sc_payments_selector_coordinator.mm b/ios/showcase/payments/sc_payments_selector_coordinator.mm
index 5d905863d1074320bdb03d235bc61f3a143d5a7c..0f775a3592b984c388396e257f1b5298f4278585 100644
--- a/ios/showcase/payments/sc_payments_selector_coordinator.mm
+++ b/ios/showcase/payments/sc_payments_selector_coordinator.mm
@@ -69,6 +69,10 @@
 
 #pragma mark - PaymentRequestSelectorViewControllerDataSource
 
+- (BOOL)allowsEditMode {
+  return NO;
+}
+
 - (CollectionViewItem*)headerItem {
   return [self createItemWithText:@"Header item"];
 }