[ASTextKitComponents] Remove unused, somewhat dangerous functions (#2007)

[ASTextKitComponents] Remove Unused Scale Conversion Functions

Author: Adlai Holler

AsyncDisplayKit/TextKit/ASTextKitComponents.h

@@ -10,24 +10,9 @@
 
 #import <UIKit/UIKit.h>
 #import <AsyncDisplayKit/ASBaseDefines.h>
-#import <tgmath.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
-ASDISPLAYNODE_INLINE CGFloat ceilPixelValueForScale(CGFloat f, CGFloat scale)
-{
-  // Round up to device pixel (.5 on retina)
-  return ceil(f * scale) / scale;
-}
-
-ASDISPLAYNODE_INLINE CGSize ceilSizeValue(CGSize s)
-{
-  CGFloat screenScale = [UIScreen mainScreen].scale;
-  s.width = ceilPixelValueForScale(s.width, screenScale);
-  s.height = ceilPixelValueForScale(s.height, screenScale);
-  return s;
-}
-
 @interface ASTextKitComponents : NSObject
 
 /**