Should I ask non-technical co-founder to leave startup?

I'm a couple months in to a startup with 2 other talented guys. I'm also the lead design,ui,ux, front-end developer (html/css/js). One other guy is the lead back end developer, and the third in question was assigned with the business dev./hustler role. This non-tech guy, in a nutshell, is smart. He's as technically savvy as you can get without actually knowing how to code. Normally, I would never ask a non-tech person to join a startup team, but I honestly felt that he had some valuable skills to bring to the table. We're about 1.5 months into the project. A working demo is about 70% done, which me and the other developer have been working on. 2 of us are full-time on this. The non-tech guy, still carries his full time job.If his priorities were in-line with the startup, he can still get a lot done during work hours, as well as night and weekends. What I'm finding however, is that he's unable to make that commitment. While me and the other developer have practically made an entire prod