disable xformers for demo

tools/synth.py

@@ -168,9 +168,9 @@ def pipe_img(
             cache_interval=cache_interval, cache_branch_id=cache_branch_id
         )  # lower is faster but lower quality
         helper.enable()
-        if torch.cuda.is_available():
-            pipe.to("cuda")
-            pipe.enable_xformers_memory_efficient_attention()
+        # if torch.cuda.is_available():
+        #     pipe.to("cuda")
+        #     pipe.enable_xformers_memory_efficient_attention()
         if use_torchcompile:
             pipe.unet = torch.compile(pipe.unet, mode="reduce-overhead", fullgraph=True)
     return pipe