How can I uninstall windows XP from my mac yosemite 10.10

Question

I am trying to uninstall XP from my mac ( mid 2010) .
I dont see that option in my bootcamp it says remove Windows 7 .
Its not even showing install option for windows 7 , please let me know how to remove xp and install Windows 7.

Answer 1

Two   methods:
Boot Camp Assistant - after you deal with how Yosemite messed up the partition table for Windows;
Clone or backup and boot from the other drive - clone or TimeMachine - then erase and restore.
It modified and messed up Boot Camp partitions and needs some magic to get it to show again. PITA.  Due to how Yosemite handles Windows partition "Boot Camp" you probably have not been able to use it. You also can install Windows, then also use it in a VM and not have to dual boot unless you want - and you have the cpu resources and RAM for both OS's, after you have your new Boot Camp setup with Windows and working. Make sure to allocate enough, generally at least 60 if not 80GB of storage - and leave enough for Mac OS as well.
Paragon Software's CampTuneX can redistribute space between OS X (HFS+) and Windows "(NTFS) partitions too. And I know they are quick to update to Yosemite, don't know if they have helped in addressing the problem like you are seeing.
You should have asked on Windows support Community under "Boot Camp" btw.
Boot Camp
Once you have Yosemite back to a single HFS+ partition (user partition anyway) you can then use BCA to create a Windows partition to install Windows 7.
http://www.apple.com/support/bootcamp