How do I remove the Ubuntu/grub from a GUID/GPT disk?

All of the advice I've found regarding this issue seems to be related to MBR, and it doesn't work.

1. Download: EasyUEFI. Install then run
2. Delete all entries related to UBUNTU and move Windows Boot Manager to the top.

Reboot. If it does not work.
Next try:
From Admin Command, run:
mountvol U: /s
dir /A /S U:\

If there's a loader.efi type:
del /F U:\path\loader.efi ====> Replace the path
if there's a ubuntu folder, type:
RD /S /Q "U:\EFI\ubuntu"
mountvol U:\ /D

Reboot.

Thx, @topgundcp . The command prompt commands did it.