Update app.py

app.py

@@ -117,7 +117,7 @@ def realesrgan(img, model_name, denoise_strength, face_enhance, outscale, ext):
         metadata = PngInfo()
         if parameters != '':
             metadata.add_text("parameters", parameters)
-        cv2.imwrite(out_filename, output, pnginfo=metadata)
+        cv2.imwrite(out_filename, output)
         global last_file
         last_file = out_filename
         return out_filename