Edit file:
$ sudo nano /etc/default/grub
Set (update) next values:
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISABLE_OS_PROBER=true
And execute:
$ sudo update-grub
Plus you may need to edit the /etc/default/grub.d/50_linuxmint.cfg
file:
-GRUB_DISABLE_OS_PROBER=false
+#GRUB_DISABLE_OS_PROBER=false