Remove DDUF model loading example

[ethrx]

Bug description.
https://huggingface.co/docs/hub/en/dduf#loading-a-dduf-file-with-diffusers

Diffusers does not support DDUF apparently.

Describe the expected behaviour

pip install diffusers==0.32.2

Exact demo from the docs:

from diffusers import DiffusionPipeline
import torch

pipe = DiffusionPipeline.from_pretrained(
    "DDUF/FLUX.1-dev-DDUF", dduf_file="FLUX.1-dev.dduf", torch_dtype=torch.bfloat16
).to("cuda")
image = pipe(
    "photo a cat holding a sign that says Diffusers", num_inference_steps=50, guidance_scale=3.5
).images[0]
image.save("cat.png")

Output:

Entry Not Found for url: https://huggingface.co/DDUF/FLUX.1-dev-DDUF/resolve/main/model_index.json.

Additional context
Please remove this, it is slightly misleading since it does not work on the latest release.