Remove the out-dated compatible code for non-ARC

SDWebImage/SDImageCache.m

@@ -50,7 +50,7 @@ FOUNDATION_STATIC_INLINE NSUInteger SDCacheCostForImage(UIImage *image) {
 @property (strong, nonatomic, nonnull) NSCache *memCache;
 @property (strong, nonatomic, nonnull) NSString *diskCachePath;
 @property (strong, nonatomic, nullable) NSMutableArray<NSString *> *customPaths;
-@property (SDDispatchQueueSetterSementics, nonatomic, nullable) dispatch_queue_t ioQueue;
+@property (strong, nonatomic, nullable) dispatch_queue_t ioQueue;
 
 @end
 
@@ -129,7 +129,6 @@ FOUNDATION_STATIC_INLINE NSUInteger SDCacheCostForImage(UIImage *image) {
 
 - (void)dealloc {
     [[NSNotificationCenter defaultCenter] removeObserver:self];
-    SDDispatchQueueRelease(_ioQueue);
 }
 
 - (void)checkIfQueueIsIOQueue {

SDWebImage/SDWebImageCodersManager.m

@@ -15,8 +15,8 @@
 
 @interface SDWebImageCodersManager ()
 
-@property (nonatomic, strong, nonnull) NSMutableArray<SDWebImageCoder>* mutableCoders;
+@property (strong, nonatomic, nonnull) NSMutableArray<SDWebImageCoder>* mutableCoders;
-@property (SDDispatchQueueSetterSementics, nonatomic, nullable) dispatch_queue_t mutableCodersAccessQueue;
+@property (strong, nonatomic, nullable) dispatch_queue_t mutableCodersAccessQueue;
 
 @end
 
@@ -43,10 +43,6 @@
     return self;
 }
 
-- (void)dealloc {
-    SDDispatchQueueRelease(_mutableCodersAccessQueue);
-}
-
 #pragma mark - Coder IO operations
 
 - (void)addCoder:(nonnull id<SDWebImageCoder>)coder {

SDWebImage/SDWebImageCompat.h

@@ -81,18 +81,6 @@
 #define NS_OPTIONS(_type, _name) enum _name : _type _name; enum _name : _type
 #endif
 
-#if OS_OBJECT_USE_OBJC
-    #undef SDDispatchQueueRelease
-    #undef SDDispatchQueueSetterSementics
-    #define SDDispatchQueueRelease(q)
-    #define SDDispatchQueueSetterSementics strong
-#else
-    #undef SDDispatchQueueRelease
-    #undef SDDispatchQueueSetterSementics
-    #define SDDispatchQueueRelease(q) (dispatch_release(q))
-    #define SDDispatchQueueSetterSementics assign
-#endif
-
 FOUNDATION_EXPORT UIImage *SDScaledImageForKey(NSString *key, UIImage *image);
 
 typedef void(^SDWebImageNoParamsBlock)(void);

SDWebImage/SDWebImageCompat.m

@@ -10,7 +10,11 @@
 #import "UIImage+MultiFormat.h"
 
 #if !__has_feature(objc_arc)
-#error SDWebImage is ARC only. Either turn on ARC for the project or use -fobjc-arc flag
+    #error SDWebImage is ARC only. Either turn on ARC for the project or use -fobjc-arc flag
+#endif
+
+#if !OS_OBJECT_USE_OBJC
+    #error SDWebImage need ARC for dispatch object
 #endif
 
 inline UIImage *SDScaledImageForKey(NSString * _Nullable key, UIImage * _Nullable image) {

SDWebImage/SDWebImageDownloader.m

@@ -21,7 +21,7 @@
 @property (strong, nonatomic, nonnull) NSMutableDictionary<NSURL *, SDWebImageDownloaderOperation *> *URLOperations;
 @property (strong, nonatomic, nullable) SDHTTPHeadersMutableDictionary *HTTPHeaders;
 // This queue is used to serialize the handling of the network responses of all the download operation in a single queue
-@property (SDDispatchQueueSetterSementics, nonatomic, nullable) dispatch_queue_t barrierQueue;
+@property (strong, nonatomic, nullable) dispatch_queue_t barrierQueue;
 
 // The session in which data tasks will run
 @property (strong, nonatomic) NSURLSession *session;
@@ -112,7 +112,6 @@
     self.session = nil;
 
     [self.downloadQueue cancelAllOperations];
-    SDDispatchQueueRelease(_barrierQueue);
 }
 
 - (void)setValue:(nullable NSString *)value forHTTPHeaderField:(nullable NSString *)field {

SDWebImage/SDWebImageDownloaderOperation.m

@@ -38,7 +38,7 @@ typedef NSMutableDictionary<NSString *, id> SDCallbacksDictionary;
 
 @property (strong, nonatomic, readwrite, nullable) NSURLSessionTask *dataTask;
 
-@property (SDDispatchQueueSetterSementics, nonatomic, nullable) dispatch_queue_t barrierQueue;
+@property (strong, nonatomic, nullable) dispatch_queue_t barrierQueue;
 
 #if SD_UIKIT
 @property (assign, nonatomic) UIBackgroundTaskIdentifier backgroundTaskId;
@@ -74,10 +74,6 @@ typedef NSMutableDictionary<NSString *, id> SDCallbacksDictionary;
     return self;
 }
 
-- (void)dealloc {
-    SDDispatchQueueRelease(_barrierQueue);
-}
-
 - (nullable id)addHandlersForProgress:(nullable SDWebImageDownloaderProgressBlock)progressBlock
                             completed:(nullable SDWebImageDownloaderCompletedBlock)completedBlock {
     SDCallbacksDictionary *callbacks = [NSMutableDictionary new];

SDWebImage/SDWebImagePrefetcher.h

@@ -61,7 +61,7 @@ typedef void(^SDWebImagePrefetcherCompletionBlock)(NSUInteger noOfFinishedUrls,
 /**
  * Queue options for Prefetcher. Defaults to Main Queue.
  */
-@property (SDDispatchQueueSetterSementics, nonatomic, nonnull) dispatch_queue_t prefetcherQueue;
+@property (strong, nonatomic, nonnull) dispatch_queue_t prefetcherQueue;
 
 @property (weak, nonatomic, nullable) id <SDWebImagePrefetcherDelegate> delegate;