grub
/etc/default/grubに以下を追加
GRUB_DISABLE_OS_PROBER=true
‘GRUB_DISABLE_OS_PROBER’ Normally, grub-mkconfig will try to use the external os-prober program, if installed, to discover other operating systems installed on the same system and generate appropriate menu entries for them. Set this option to ‘true’ to disable this.