Hi there, and welcome to LQ!
I initially installed as dual boot too, when I was revoltingly sick of Windoze but still wasn't sure if I needed it for anything. After 2 weeks of tooling around with Slackware Linux, I noticed that I hadn't even thought of booting Win, and so I tossed it out like trash :-P and have been sleek and bloat-free ever since
Best of luck in your Linuxing!
Sasha