How to Remove the Logo from Divi Navigation Header
Log in to your WP Admin panel. Navigate to Divi>Theme Options in the menu.
Now for hiding the logo in the mobile view, go back to Divi's Theme Customizer starting menu.
Click on the "Mobile Styles" option.
Now click on the "Mobile Menu" option.
Check the option "HIDE LOGO IMAGE", and click "Save & Publish".