Prevent API misuse at compile time (#2035)

Using Objective-C attributes, in this case `unavailable`, we can hide
unsupported APIs at compile time instead of detecting and warn about it
at runtime with a set of asserts.

AsyncDisplayKit/Details/ASAbstractLayoutController.h

@@ -17,4 +17,10 @@ NS_ASSUME_NONNULL_BEGIN
 
 @end
 
+@interface ASAbstractLayoutController (Unavailable)
+
+- (NSSet *)indexPathsForScrolling:(ASScrollDirection)scrollDirection rangeMode:(ASLayoutRangeMode)rangeMode rangeType:(ASLayoutRangeType)rangeType __unavailable;
+
+@end
+
 NS_ASSUME_NONNULL_END