reactSetInheritedBackgroundColor was removed from RCTView

Summary:
Now setting explicit backgroundColor style is required for Views with background shadow,
otherwise the shadow will be generated based on content of the view (which is expected behaviour).

Reviewed By: mmmulani

Differential Revision: D6582587

fbshipit-source-id: 0514cb3c57bad17d2af40810b0e0f7ddc96a2c31

React/Views/RCTView.m

@@ -691,14 +691,6 @@ static BOOL RCTLayerHasShadow(CALayer *layer)
   return layer.shadowOpacity * CGColorGetAlpha(layer.shadowColor) > 0;
 }
 
-- (void)reactSetInheritedBackgroundColor:(UIColor *)inheritedBackgroundColor
-{
-  // Inherit background color if a shadow has been set, as an optimization
-  if (RCTLayerHasShadow(self.layer)) {
-    self.backgroundColor = inheritedBackgroundColor;
-  }
-}
-
 static void RCTUpdateShadowPathForView(RCTView *view)
 {
   if (RCTLayerHasShadow(view.layer)) {