Delete windows recovery partitions

Run PowerShell as admin
Run DISKPART.

Find disk ID:
DISKPART> list disk

Select disk you want to modify:
DISKPART> select disk 1

Find partition ID:
DISKPART> list partition

Select partition you want to delete:
DISKPART> select partition 5

Delete selected partition:
DISKPART> delete partition override
DISKPART> exit

Source: www.lifewire.com