NLA editor mesh and plane delete?

Suddenly I see mesh and plane in my NLA editor. Do not how that happened.
Anyhow how can I delete them?


on the NLA space menu bar, the button with the action icon, next to the little ghost. “include animation data blocks with no NLA data”. Try turning that off. If a datablock has animation_data … this could be a driver for example, or has had a driver or action which has been subsequently rem0ved, then it appears in the NLA editor.

If you are familiar with scripting, you can remove animation data using the python console, by selecting the object and running

>>> C.object.animation_data_clear()

Thanks could be possible that I have removed some action.
Should I remove the animation data or can I leave it this way.
I have no experience with python scripting.