Remove unused ReactSafeAreaViewShadowNode (#52985)

Summary:
Pull Request resolved: #52985

This class is essentially a wrapper of LayoutShadowNode with no extra logic added.
Let's remove it.

Changelog:
[Internal] [Changed] -

Reviewed By: alanleedev

Differential Revision: D79450688

fbshipit-source-id: 943e10e602cb9a5b77fca81e11d2333828b27813

Author: cortinico

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/safeareaview/ReactSafeAreaViewManager.kt

@@ -31,10 +31,9 @@ internal class ReactSafeAreaViewManager :
 
   override fun getName(): String = REACT_CLASS
 
-  override fun createShadowNodeInstance(): LayoutShadowNode = ReactSafeAreaViewShadowNode()
+  override fun createShadowNodeInstance(): LayoutShadowNode = LayoutShadowNode()
 
-  override fun getShadowNodeClass(): Class<out LayoutShadowNode> =
-      ReactSafeAreaViewShadowNode::class.java
+  override fun getShadowNodeClass(): Class<out LayoutShadowNode> = LayoutShadowNode::class.java
 
   override fun updateState(
       view: ReactSafeAreaView,