.navbar { display: none; }

Editing The Top Bar Menu

All the top bar elements are menu items. To edit these items go to WP Admin > Appearance > Menus > Top menu. If need to customize the styles of the top menu, follow the next instructions:

1
Go to WP Admin > Appearance > Headers/Footers > Header - Default Design, and open the header in the Live Composer page builder.
2
Open the "Mega Menu element" options panel (click on the "cog" icon). 

If you are using the SEOWP theme version 1.8.7 or below:

For header customizations, visit WP Admin > Appearance > Customizer.