Remove `sd_setAnimationImagesWithURLs` API, because its cause ambiguity, behave not consistently and have rare use case.

SDWebImage/UIImageView+WebCache.h

@@ -189,22 +189,4 @@
                   progress:(nullable SDImageLoaderProgressBlock)progressBlock
                  completed:(nullable SDExternalCompletionBlock)completedBlock;
 
-#if SD_UIKIT
-
-#pragma mark - Animation of multiple images
-
-/**
- * Download an array of images and starts them in an animation loop
- *
- * @param arrayOfURLs An array of NSURL
- */
-- (void)sd_setAnimationImagesWithURLs:(nonnull NSArray<NSURL *> *)arrayOfURLs;
-
-/**
- * Cancel the current animation images load
- */
-- (void)sd_cancelCurrentAnimationImagesLoad;
-
-#endif
-
 @end

SDWebImage/UIImageView+WebCache.m

@@ -64,78 +64,4 @@
                            }];
 }
 
-#if SD_UIKIT
-
-#pragma mark - Animation of multiple images
-
-- (void)sd_setAnimationImagesWithURLs:(nonnull NSArray<NSURL *> *)arrayOfURLs {
-    [self sd_cancelCurrentAnimationImagesLoad];
-    NSPointerArray *operationsArray = [self sd_animationOperationArray];
-    
-    [arrayOfURLs enumerateObjectsUsingBlock:^(NSURL *logoImageURL, NSUInteger idx, BOOL * _Nonnull stop) {
-        __weak __typeof(self) wself = self;
-        id <SDWebImageOperation> operation = [[SDWebImageManager sharedManager] loadImageWithURL:logoImageURL options:0 progress:nil completed:^(UIImage *image, NSData *data, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
-            __strong typeof(wself) sself = wself;
-            if (!sself) return;
-            dispatch_main_async_safe(^{
-                [sself stopAnimating];
-                if (sself && image) {
-                    NSMutableArray<UIImage *> *currentImages = [[sself animationImages] mutableCopy];
-                    if (!currentImages) {
-                        currentImages = [[NSMutableArray alloc] init];
-                    }
-                    
-                    // We know what index objects should be at when they are returned so
-                    // we will put the object at the index, filling any empty indexes
-                    // with the image that was returned too "early". These images will
-                    // be overwritten. (does not require additional sorting datastructure)
-                    while ([currentImages count] < idx) {
-                        [currentImages addObject:image];
-                    }
-                    
-                    currentImages[idx] = image;
-
-                    sself.animationImages = currentImages;
-                    [sself setNeedsLayout];
-                }
-                [sself startAnimating];
-            });
-        }];
-        @synchronized (self) {
-            [operationsArray addPointer:(__bridge void *)(operation)];
-        }
-    }];
-}
-
-static char animationLoadOperationKey;
-
-// element is weak because operation instance is retained by SDWebImageManager's runningOperations property
-// we should use lock to keep thread-safe because these method may not be acessed from main queue
-- (NSPointerArray *)sd_animationOperationArray {
-    @synchronized(self) {
-        NSPointerArray *operationsArray = objc_getAssociatedObject(self, &animationLoadOperationKey);
-        if (operationsArray) {
-            return operationsArray;
-        }
-        operationsArray = [NSPointerArray weakObjectsPointerArray];
-        objc_setAssociatedObject(self, &animationLoadOperationKey, operationsArray, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
-        return operationsArray;
-    }
-}
-
-- (void)sd_cancelCurrentAnimationImagesLoad {
-    NSPointerArray *operationsArray = [self sd_animationOperationArray];
-    if (operationsArray) {
-        @synchronized (self) {
-            for (id operation in operationsArray) {
-                if ([operation conformsToProtocol:@protocol(SDWebImageOperation)]) {
-                    [operation cancel];
-                }
-            }
-            operationsArray.count = 0;
-        }
-    }
-}
-#endif
-
 @end