Eliminated partition on external hard drive.

Same as on an internal one, delete it in disk manager. Why do you want to delete it?, do you realise that you won't be able to use it without a partition.
A hard drive without a partition is just a paper weight.

Hi, before it use to be my computer main drive with windows vista but I tried to install windows xp but I couldn't sow I tried using it like external hard drive to eliminated the partitions sow I formatted the two partitions hopping I could install windows xp but I cannot eliminated the partitions. Thanks Jonmor68.