Fix crash on reloading the app (#7646)

lib/ios/RNNComponentView.m

@@ -1,57 +1,6 @@
 #import "RNNComponentView.h"
-#import "RCTHelpers.h"
 
 @implementation RNNComponentView {
-    BOOL _observeLayerChange;
 }
 
-- (void)layoutSubviews {
-    [super layoutSubviews];
-#ifdef DEBUG
-    [self removeYellowBox];
-#endif
-}
-
-#ifdef DEBUG
-- (void)removeYellowBox {
-    if (self.subviews.count > 0 && self.subviews.firstObject.subviews.count > 0) {
-        if (!_observeLayerChange) {
-            [self.subviews.firstObject.subviews.firstObject.layer
-                addObserver:self
-                 forKeyPath:@"sublayers"
-                    options:NSKeyValueObservingOptionNew
-                    context:nil];
-            _observeLayerChange = YES;
-        }
-
-        for (UIView *view in self.subviews.firstObject.subviews.firstObject.subviews) {
-            if ([view.accessibilityLabel isEqualToString:@"! Yellow Box"]) {
-                view.layer.opacity = 0;
-                view.layer.zPosition = -100;
-            }
-        }
-    }
-}
-
-- (void)observeValueForKeyPath:(NSString *)keyPath
-                      ofObject:(id)object
-                        change:(NSDictionary *)change
-                       context:(void *)context {
-    if ([keyPath isEqualToString:@"sublayers"]) {
-        if (((CALayer *)object).sublayers.count > 1) {
-            ((CALayer *)object).sublayers.lastObject.opacity = 0;
-            ((CALayer *)object).sublayers.lastObject.zPosition = -100;
-        }
-    }
-}
-
-- (void)dealloc {
-    if (_observeLayerChange) {
-        [self.subviews.firstObject.subviews.firstObject.layer removeObserver:self
-                                                                  forKeyPath:@"sublayers"];
-    }
-}
-
-#endif
-
 @end