Fix DeadVariable and NotInvokedPrivateMethod: Remove unused code (facebook#55503)

Summary:

Remove unused code that was triggering lint warnings:
1. Remove `walkUpUntilNativeKindIsParent` private method that was never invoked
2. Remove `parent` variable in `applyLayoutBase` that was never accessed

Both were leftover from NativeKind removal.

changelog: [internal] internal

Reviewed By: alanleedev

Differential Revision: D92021031

Author: mdvacca

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/NativeViewHierarchyOptimizer.java

@@ -231,12 +231,6 @@ public void onBatchComplete() {
     mTagsWithLayoutVisited.clear();
   }
 
-  private NodeIndexPair walkUpUntilNativeKindIsParent(
-      ReactShadowNode node, int indexInNativeChildren) {
-    // Logic removed due to NativeKind removal
-    return new NodeIndexPair(node, indexInNativeChildren);
-  }
-
   private void addNodeToNode(ReactShadowNode parent, ReactShadowNode child, int index) {
     // Logic removed due to NativeKind removal
   }
@@ -289,8 +283,6 @@ private void applyLayoutBase(ReactShadowNode node) {
     }
     mTagsWithLayoutVisited.put(tag, true);
 
-    ReactShadowNode parent = node.getParent();
-
     // We use screenX/screenY (which round to integer pixels) at each node in the hierarchy to
     // emulate what the layout would look like if it were actually built with native views which
     // have to have integral top/left/bottom/right values