If at some point you decide you've had enough of Boot Camp (perhaps because you want to use virtualization software exclusively instead), you can remove the entire Windows partition from your disk. But don't use Disk Utility to do this; use Boot Camp Assistant.
To remove your Windows partition:
Back up anything from the Windows partition that you want to keep, either by copying it to the Mac partition while running Mac OS X or by putting it on a disc, external hard drive, or other media.
Back up the Mac OS X partition of your drive. A bootable duplicate on an external hard drive is your safest bet.
Launch Boot Camp Assistant (in
/Applications/Utilities) and click through the introduction screen.
On the Select Task ...