Is there a way to hide the page header in a custom Lightning App shown below ?
This banner is not available in the Edit page section.

I have selected 'One region Template' and added just one Lightning component.

[![enter image description here](https://i.stack.imgur.com/TcYV2.png)](https://i.stack.imgur.com/TcYV2.png)

But after saving the header comes by default which I want to remove.

[![enter image description here](https://i.stack.imgur.com/N7ozu.png)](https://i.stack.imgur.com/N7ozu.png)

PS: I was able to remove the header by putting the display as none as shown below. But don't know which standard class to refer in css

[![enter image description here](https://i.stack.imgur.com/kHnED.png)](https://i.stack.imgur.com/kHnED.png)