Bug#1102182: efibootmgr: If Secure Boot is enabled, the system may not start after rebooting

[Tanaka]

Perhaps this /File(\EFI\DEBIAN\GRUBX64.EFI). BO is not installed by 
Debian, but the firmware of my computer found GRUBX64.EFI in the EFI 
system partition and added it to the boot entry on its own.

Is it possible to not install grubx64.efi in ESP when using shim?