Temporary change to test blocking signal

Differential Revision: D101617654

Author: j-piasecki

packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.h

@@ -156,6 +156,8 @@ class ShadowTree final {
    */
   void mergeReactRevision() const;
 
+  void noop() const {};
+
  private:
   constexpr static ShadowTreeRevision::Number INITIAL_REVISION{0};