code review updates: sprite_atlas brackets and nullable removed for reuseIdentifier of annotationImage

include/mbgl/ios/MGLAnnotationImage.h

@@ -13,7 +13,7 @@ NS_ASSUME_NONNULL_BEGIN
 *   @param image The image to be displayed for the annotation.
 *   @param reuseIdentifier The string that identifies that this annotation image is reusable.
 *   @return The initialized annotation image object or `nil` if there was a problem initializing the object. */
-+ (instancetype)annotationImageWithImage:(UIImage *)image reuseIdentifier:(nullable NSString *)reuseIdentifier;
++ (instancetype)annotationImageWithImage:(UIImage *)image reuseIdentifier:(NSString *)reuseIdentifier;
 
 /** @name Getting and Setting Attributes */
 

platform/ios/MGLAnnotationImage.m

@@ -9,12 +9,12 @@
 
 @implementation MGLAnnotationImage
 
-+ (instancetype)annotationImageWithImage:(UIImage *)image reuseIdentifier:(nullable NSString *)reuseIdentifier
++ (instancetype)annotationImageWithImage:(UIImage *)image reuseIdentifier:(NSString *)reuseIdentifier
 {
     return [[self alloc] initWithImage:image reuseIdentifier:reuseIdentifier];
 }
 
-- (instancetype)initWithImage:(UIImage *)image reuseIdentifier:(nullable NSString *)reuseIdentifier
+- (instancetype)initWithImage:(UIImage *)image reuseIdentifier:(NSString *)reuseIdentifier
 {
     self = [super init];
 

src/mbgl/sprite/sprite_atlas.cpp

@@ -187,12 +187,9 @@ void SpriteAtlas::updateDirty() {
             // The two names match;
             Holder& holder = imageIterator->second;
             holder.texture = spriteIterator->second;
-            if (holder.texture != nullptr)
-            {
+            if (holder.texture != nullptr) {
                 copy(holder, imageIterator->first.second);
-            }
-            else
-            {
+            } else {
                 images.erase(imageIterator);
             }