grub: remove unnecessary config (#4277)

extensions/grub.sh

@@ -115,16 +115,6 @@ pre_umount_final_image__install_grub() {
 	# Remove host-side config.
 	rm -f "${MOUNT}"/etc/default/grub.d/99-armbian-host-side.cfg
 
-	local root_uuid
-	root_uuid=$(blkid -s UUID -o value "${LOOP}p1") # get the uuid of the root partition, this has been transposed
-
-	# Create /boot/efi/EFI/BOOT/grub.cfg (EFI/ESP) which will load /boot/grub/grub.cfg (in the rootfs, generated by update-grub)
-	cat <<- grubEfiCfg > "${MOUNT}"/boot/efi/EFI/BOOT/grub.cfg
-		search.fs_uuid ${root_uuid} root
-		set prefix=(\$root)'/boot/grub'
-		configfile \$prefix/grub.cfg
-	grubEfiCfg
-
 	umount_chroot "$chroot_target/"
 
 }