Remove unnecessary semicolon.

UIKit+AFNetworking/AFImageDownloader.m

@@ -176,7 +176,7 @@
 
 - (nullable AFImageDownloadReceipt *)downloadImageForURLRequest:(NSURLRequest *)request
                                                         success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse  * _Nullable response, UIImage *responseObject))success
-                                                        failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure; {
+                                                        failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure {
     NSUUID *callerUUID = [NSUUID UUID];
     __block NSURLSessionDataTask *task = nil;
     dispatch_sync(self.synchronizationQueue, ^{