If we can't find a feed, it must be deleted by another device, so consider it a success. Fixes #3042

Account/Sources/Account/CloudKit/CloudKitAccountZone.swift

@@ -180,10 +180,14 @@ final class CloudKitAccountZone: CloudKitZone {
 				}
 				
 			case .failure(let error):
+				if let ckError = ((error as? CloudKitError)?.error as? CKError), ckError.code == .unknownItem {
+					completion(.success(true))
+				} else {
 					completion(.failure(error))
 				}
 			}
 		}
+	}
 	
 	func moveWebFeed(_ webFeed: WebFeed, from: Container, to: Container, completion: @escaping (Result<Void, Error>) -> Void) {
 		guard let fromContainerExternalID = from.externalID, let toContainerExternalID = to.externalID else {