Remove just one dropdown arrow in Divi Menu (from Theme Builder)

Hello.

I'm trying to remove just one arrow from my menu (created in the theme builder): the one after my "contact" button. The thing is, I have this "contact" button in my menu which has submenus, but I don't know how to include the arrow in my button, that's why I'd like to remove it (or if you know how to include it in my button I'd be glad to know too).

See attached image. Thanks for your help.