Fabric: Removed unnecessary call in `RootShadowNode::clone`

Summary: The removed code does nothing because we are replacing the oldChild with newChild several lines above.

Reviewed By: JoshuaGross

Differential Revision: D14402637

fbshipit-source-id: 731a950f373e20f7d5bae3cbf6470335d3694ccc

ReactCommon/fabric/components/root/RootShadowNode.cpp

@@ -70,8 +70,6 @@ UnsharedRootShadowNode RootShadowNode::clone(
         /* .children = */ sharedChildren,
     });
 
-    newParent->replaceChild(oldChild, newChild);
-
     oldChild = oldParent;
     newChild = newParent;
   }