refactor(core): remove prototype contact paths for experimental saved devices

Co-authored-by: Cursor <cursoragent@cursor.com>

apple/VniDrop/Features/Send/SendModel.swift

@@ -96,8 +96,6 @@ final class SendModel: ObservableObject {
 				case .receiverHistoryChanged(let id), .approvalChanged(let id):
 					if id == self.state.selectedTransferId { self.refreshReceivers(id) }
 					self.refreshReceiverStatuses(for: id)
-				case .contactsChanged, .offersChanged:
-					break
 				}
 			}
 			.store(in: &cancellables)