remove xformers

diff.py

@@ -38,7 +38,6 @@ def load_model(model_id="KBlueLeaf/Kohaku-XL-Zeta", device="cuda"):
         model_id, torch_dtype=torch.float16
     ).to(device)
     unet: UNet2DConditionModel = pipe.k_diffusion_model.inner_model.model
-    unet.enable_xformers_memory_efficient_attention()
     pipe.scheduler.set_timesteps = partial(
         set_timesteps_polyexponential, pipe.scheduler, pipe.scheduler.sigmas
     )

requirements.txt

@@ -3,4 +3,3 @@ spaces
 diffusers
 k_diffusion
 sentencepiece
-xformers