Type "diskpart.exe" in the search box, in the listed results, right-click on Diskpart and select Run as administrator.
At a Diskpart prompt, type in "list disk" to display all the disks. Each disk on your computer will be listed with a disk number.
Specify the disk that contains the recovery partition by typing in "select disk n", in which "n" should be replaced with the disk number listed before.
Type in "list volume" to list all the partitions on the selected disk with all the partition labels, so you can determine which one is the recovery partition to be deleted. If you want to see the partition type, use "list partition" command instead.
Specify the partition you want to delete using the volume number, like this: "select volume 3".
Type in: "delete volume".