How to empty no keyframes, blank?

B4W EXPORT WARNING: The action "Action" has no fcurves.. See more details in https://www.blend4web.com/doc/en/addon.html#other-messages

These empty how to solve it, originally wanted to capture, but unfortunately, there is no support.
I found no key frame movement, but I don't need that, who would have to know how to delete that action, I tried a lot of methods to remove it.

I'm so sorry! I am Chinese, my English is very bad.

Could you please attach your .blend file with an issue?

Reply to post of user Pavel Kotov
Could you please attach your .blend file with an issue?

Well, I had a case, in fact, I just want to know how to empty a useless action.
link
http://pan.baidu.com/s/1c2snDkO

In blender 'Outliner'
The pull down menu usually says 'All Scenes' has an item called 'Orphan Data'
You should see the orphaned action, you can click the 'Purge All' button to get rid of unused actions.

Reply to post of user Mike
In blender 'Outliner'
The pull down menu usually says 'All Scenes' has an item called 'Orphan Data'
You should see the orphaned action, you can click the 'Purge All' button to get rid of unused actions.

Hi, I'm sorry, I tried your method, but "Orphan Data" does not have a corresponding action, also could not be found "Purge All" button.I want to thank you