Fix flake8 complaints

Signed-off-by: M Q <[email protected]>

Author: MMelQin

examples/apps/hugging_face_integration_app/med_image_generation/app.py

@@ -1,13 +1,10 @@
 import argparse
 import logging
-from pathlib import Path
 
-import numpy as np
 import torch
 from diffusers import StableDiffusionPipeline
-from PIL import Image
 
-from monai.deploy.core import AppContext, Application
+from monai.deploy.core import Application
 
 
 class App(Application):