Fix azure image mypy issues

litellm/llms/azure_ai/image_edit/flux2_transformation.py

@@ -88,7 +88,7 @@ class AzureFoundryFlux2ImageEditConfig(OpenAIImageEditConfig):
         self,
         model: str,
         prompt: Optional[str],
-        image: FileTypes,
+        image: Optional[FileTypes],
         image_edit_optional_request_params: Dict,
         litellm_params: GenericLiteLLMParams,
         headers: dict,
@@ -102,6 +102,9 @@ class AzureFoundryFlux2ImageEditConfig(OpenAIImageEditConfig):
         if prompt is None:
             raise ValueError("FLUX 2 image edit requires a prompt.")
         
+        if image is None:
+            raise ValueError("FLUX 2 image edit requires an image.")
+        
         image_b64 = self._convert_image_to_base64(image)
 
         # Build request body with required params