uninstall linux 6.0

I have a win98 and Linux 6.0 on my computer. I partitioned the hard drive
and left 2 gb for the linux partition and linux Red Hat 6.0. I don't use
the Linux anymore and want to uninstall it and remove the partition.
How do I remove that partition as FDISK does not recognize it? I don't
know much about Linux and I don't have the magic partitioning disk (or
CD). Do you know how I can do it? I really appreciate if you can be
specific about your tips, since I am not familiar with Linux. 
Thanks in advance, 

Rosita