How to uninstall or remove grub-firmware-qemu software package from Debian 9 (Stretch)

You can uninstall or removes an installed grub-firmware-qemu package itself from Debian 9 (Stretch) through the terminal,

$ sudo apt-get remove grub-firmware-qemu

Uninstall grub-firmware-qemu including dependent package

If you would like to remove grub-firmware-qemu and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove grub-firmware-qemu

Use Purging grub-firmware-qemu

If you use with purge options to grub-firmware-qemu package all the configuration and dependent packages will be removed.

$ sudo apt-get purge grub-firmware-qemu

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove grub-firmware-qemu