Remove Sync and Scene functions from Renderer.

PiperOrigin-RevId: 828481721
Change-Id: Id0399139653b0ec27f0d365437e62cadefadfe6c

src/experimental/studio/app.h

@@ -49,9 +49,6 @@ class App {
   // Processes window events and advances the state of the simulation.
   bool Update();
 
-  // Syncs the state of the simulation with the renderer.
-  void Sync();
-
   // Builds the GUI. We do this after Sync() to ensure we have the latest data
   // for building the GUI.
   void BuildGui();