Eliminate top bar

use the following code..
PSSS: ITS JUST A SAMEPLE CODE LOOK UR FOR EXACT NAMES

.header{
display:none;
}

Manoj HP is right.

Should be able to go into Onetone Options > Header > Top Bar Options and the first selection is “Display Top Bar” choose no, save and it should be gone.

After this the home-section is not fullscreen (not full-height).
How to fix this?
Thanks