Deprecate calculateChildFrames from RCTScrollView

Summary:
This function is unused. (Followup to D21941946)

Changelog: [iOS] Deprecate calculateChildFrames from RCTScrollView

Reviewed By: sammy-SC

Differential Revision: D22071415

fbshipit-source-id: 0c996ab02df1431ee9cfa082bc99681a2ec7118c

Author: Peter Argany

React/Views/ScrollView/RCTScrollView.m

@@ -600,36 +600,6 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView
   RCT_FORWARD_SCROLL_EVENT(scrollViewDidScroll : scrollView);
 }
 
-- (NSArray<NSDictionary *> *)calculateChildFramesData
-{
-  NSMutableArray<NSDictionary *> *updatedChildFrames = [NSMutableArray new];
-  [[_contentView reactSubviews] enumerateObjectsUsingBlock:^(UIView *subview, NSUInteger idx, __unused BOOL *stop) {
-    // Check if new or changed
-    CGRect newFrame = subview.frame;
-    BOOL frameChanged = NO;
-    if (self->_cachedChildFrames.count <= idx) {
-      frameChanged = YES;
-      [self->_cachedChildFrames addObject:[NSValue valueWithCGRect:newFrame]];
-    } else if (!CGRectEqualToRect(newFrame, [self->_cachedChildFrames[idx] CGRectValue])) {
-      frameChanged = YES;
-      self->_cachedChildFrames[idx] = [NSValue valueWithCGRect:newFrame];
-    }
-
-    // Create JS frame object
-    if (frameChanged) {
-      [updatedChildFrames addObject:@{
-        @"index" : @(idx),
-        @"x" : @(newFrame.origin.x),
-        @"y" : @(newFrame.origin.y),
-        @"width" : @(newFrame.size.width),
-        @"height" : @(newFrame.size.height),
-      }];
-    }
-  }];
-
-  return updatedChildFrames;
-}
-
 - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
 {
   _allowNextScrollNoMatterWhat = YES; // Ensure next scroll event is recorded, regardless of throttle

React/Views/ScrollView/RCTScrollViewManager.m

@@ -12,12 +12,6 @@
 #import "RCTShadowView.h"
 #import "RCTUIManager.h"
 
-@interface RCTScrollView (Private)
-
-- (NSArray<NSDictionary *> *)calculateChildFramesData;
-
-@end
-
 @implementation RCTConvert (UIScrollView)
 
 RCT_ENUM_CONVERTER(
@@ -140,22 +134,6 @@ - (UIView *)view
       }];
 }
 
-RCT_EXPORT_METHOD(calculateChildFrames : (nonnull NSNumber *)reactTag callback : (RCTResponseSenderBlock)callback)
-{
-  [self.bridge.uiManager
-      addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, RCTScrollView *> *viewRegistry) {
-        RCTScrollView *view = viewRegistry[reactTag];
-        if (!view || ![view isKindOfClass:[RCTScrollView class]]) {
-          return;
-        }
-
-        NSArray<NSDictionary *> *childFrames = [view calculateChildFramesData];
-        if (childFrames) {
-          callback(@[ childFrames ]);
-        }
-      }];
-}
-
 RCT_EXPORT_METHOD(scrollTo
                   : (nonnull NSNumber *)reactTag offsetX
                   : (CGFloat)x offsetY