Remove EFI Dual Boot

The only reason to bother with dual boot is if you can not fit an additional drive into the PC.
Pull the other drives > install Linux to the new drive > hook up the other drives and use the bios boot menu to boot the Linux drive.

https://www.youtube.com/watch?v=sgMu3DYuVYY
This is a video
11:30 is start of remove dual boot entries
Find open drive letter
diskpart
list volume
see fat32
select vol #
assing letter=x
open Task Manager
>file>run.run new task
open drive X
open efi
delete the linux folder
check boot folder for any linux entry
diskpart
remove letter=X
exit