You can fix this following this post:
That is an entry in the Bootloader and you can remove that. Removing it may just maybe cause the grub menu to not appear as such, though it can and will if you tap esc or tab - which as mentioned above, is essential.
If Windows is Not Installed, you can remove the bootloader entry with:
efibootmgr
You should see an entry for Windows like
Boot0000* Windows Boot Manager
Note the four digit number. You need only the last digit of that four digit number.
Replace 0 in the following example w…
Please post the terminal output for
sudo lshw -C video
As Windows is no longer present, please disable