Hello,
Three levers are a little taxing up front on the handlebars...
The best thing to do for safety of course, is to keep both front and rear brakes and buy a "dual pull brake lever".
Both cables run into one lever and with one hand, the bike will stop very nicely!
When you tighten the brake cables, just have the rear brake catch a little earlier then the front...
They are sold online, ebay, and at local bike shops...