Drop VAE tiling (it fits at normal decode); PiD has no tiling API to apply during upscale

app.py

@@ -241,14 +241,6 @@ def generate(
     num_inference_steps = int(num_inference_steps)
     H = W = int(resolution)
 
-    # Heavy resolutions push the VAE decode over the 48GB MIG budget — slice + tile.
-    # Mutating pipeline.vae here is fork-local (ZeroGPU forks per call) so no cleanup needed.
-    if H >= 768:
-        try:
-            pipeline.vae.enable_tiling()
-            pipeline.vae.enable_slicing()
-        except Exception as _e:
-            print(f"[pid] VAE tiling/slicing not available: {_e}", flush=True)
 
     # initial: show the live preview, hide the final slider
     yield gr.update(visible=True, value=None, label="Generating Z-Image…"), gr.update(visible=False, value=None), gr.update(value=seed)