message: remove empty quote
diff: @@ -411,7 +411,6 @@ class_ignore_list = (
  # Requires opencv to be configured with -DOPENCV_ENABLE_NONFREE=ON
  # and needs some gen_rust.py changes to build correctly.
  "cv::xfeatures2d",
  - ""
  )
  # list of constants to skip, elements are regular expressions for re.match() against ConstInfo.name
  