Update app.py

app.py

@@ -51,7 +51,7 @@ class MedicalDiagnosisModel:
             logger.error(f"Error loading model: {str(e)}")
             return None
             
-    def preprocess_image(self, image: Image.Image) -> np.ndarray:
+    def preprocess_image(self, image: Image.Image):
         """Preprocess the input image for model prediction."""
         try:
             # Convert to RGB and resize