make slight change to how not modified responses are handled

Frameworks/Account/Account.swift

@@ -285,7 +285,7 @@ public final class Account: DisplayNameProvider, UnreadCountProvider, Container,
 		delegate.refreshAll(for: self, completionHandler: completion)
 	}
 
-	public func update(_ feed: Feed, with parsedFeed: ParsedFeed, _ completion: @escaping RSVoidCompletionBlock) {
+	public func update(_ feed: Feed, with parsedFeed: ParsedFeed, _ completion: @escaping (() -> Void)) {
 
 		feed.takeSettings(from: parsedFeed)
 

Frameworks/Account/Feedbin/FeedbinAPICaller.swift

@@ -47,7 +47,7 @@ final class FeedbinAPICaller: NSObject {
 		
 	}
 	
-	func retrieveTags(completionHandler completion: @escaping  (Result<[FeedbinTag], Error>) -> Void) {
+	func retrieveTags(completionHandler completion: @escaping  (Result<[FeedbinTag]?, Error>) -> Void) {
 		
 		let callURL = feedbinBaseURL.appendingPathComponent("tags.json")
 		let conditionalGet = accountMetadata?.conditionalGetInfo[AccountMetadata.ConditionalGetKeys.tags]

Frameworks/Account/Feedbin/FeedbinAccountDelegate.swift

@@ -85,13 +85,15 @@ private extension FeedbinAccountDelegate {
 				self?.syncFolders(account, tags)
 				completion(.success(()))
 			case .failure(let error):
-				self?.checkErrorOrNotModified(error, completion: completion)
+				completion(.failure(error))
 			}
 		}
 		
 	}
 	
-	func syncFolders(_ account: Account, _ tags: [FeedbinTag]) {
+	func syncFolders(_ account: Account, _ tags: [FeedbinTag]?) {
+		
+		guard let tags = tags else { return }
 		
 		let tagNames = tags.map { $0.name }
 
@@ -121,18 +123,4 @@ private extension FeedbinAccountDelegate {
 		
 	}
 	
-	func checkErrorOrNotModified(_ error: Error, completion: @escaping (Result<Void, Error>) -> Void) {
-		switch error {
-		case TransportError.httpError(let status):
-			if status == HTTPResponseCode.notModified {
-				completion(.success(()))
-			} else {
-				completion(.failure(error))
-			}
-		default:
-			completion(.failure(error))
-		}
-
-	}
-	
 }