Safest way to remove a Linux Distro from Dual boot

Find the boot order number of the distro using efibootmgr
Remove the distro from the boot menu using sudo efibootmgr -b <the number found above> -B
Remove the distro’s efi file. You can find where the EFI file of your distro is located online. Example for Ubuntu it is located in /boot/efi/EFI/ubuntu/grubx64.efi
After this if you reboot, your system will directly boot into windows.
Now you can safely delete the partition that you would have made earlier for ubuntu from Windows without worrying that the PC will crash next time on booting.