So you just want to delete it?
Go to Satrt > Run > Copy and paste:
Then on (the left) click on "Disc Managment".
Then find the 15MB partition > Right Click > Delete. However this partition will then become FREE SPACE as its only 15MB i would leave it.
Pop the boot floppy in the drive and restart. Give it a few miniutes and at the prompt Type:
Then to delete any partition press 3.
You have to choose which type of partition to delete. Choose carefully or else you could delete the operating system. Identify the correct partition by its size 15MB.
If you want after you have typed FDISK and pressed enter you can press 4. This will show you your partitions find the 15MB one and then you know which to delete.
You can also delete the partition by the XP CD. Pop the CD in the drive and let the computer boot from the CD. You can delete it from there.
If you've never touched FDISK use the XP CD to delete the partiton.