Hiding columns of mega menu on mobile devices

Hi,

I have an issue regarding the mobile menu: In the first menu item, in the sub menu there is the menu-item-619 (class=menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children avia_mega_menu_columns_2 three units avia_mega_menu_columns_first) which is displayed as an empty menu item in the mobile menu.

It seems to me that there are some paddings in the mobile menu from the mega menu columns I created for the desktop version. Can I get rid of them?

Kind regards