How to get of the wrapper of Custom action with Aura wrapper of lwc component

I am creating a custom action for publish article in knowledge object. I used an Aura wrapper to wrap the lwc component and then used custom action to point to that (why a wrapper? Because I don't think create a custom action with lwc is currently supported for knowledge object).

So my pop up dialog currently looks like this:

The thing is, I really don't want to have the cancel button at the bottom. The publish Article head bar is okay but getting rid of it is also okay to me. When I inspect the elements from developer tool it seems like this is coming from Aura or the custom action itself. So how can I remove that one?