How to remove top menu?

I deleted all menu widgets in my control panel but if you scroll across the top right of my website page, you’ll see it highlight (it’s in white now) a menu.
I don’t want any menu up there at all.
How do I delete/hide it?

Hey there,
Hope you’re doing well today

Kindly add and save the following code to Appearance > Customize > Additional CSS:

nav.header-navigation {
    display: none!Important;

Best Regards,

Thank you! That worked!

Hello there,

I am glad the solution worked for you.
Please feel free to contact us again in the future regarding any other issues.

Best Regards,