Hi, i previously had installed ubuntu as a dual boot with windows 10 on my lenovo yoga 2 pro (i7, 8gb ram, 256gb ssd). But i eventually decided to get rid of it after some file issues and just not being happy/interested in the distro. So i booted into windows deleted the linux partitions and changed the boot sequence, but i think my genius (sarcasm) ass took the stupid way out as the Ubuntu option is still in the boot menu when i went to change the boot sequence and when i go to boot from a usb. Now when i try to boot manjaro from a bootable usb it says "error: unknown file system, entering rescue disk..., grub rescue>" which i also read up on and comes up like this as an issue when uninstalling an os when dual booting it with windows 10. NOW the question is does anyone know a way to fix the grub bootloader to allow it to boot a usb/ know a way to completely remove the grub loader option so it doesn't show up on the boot menu which is what i think i need to do so that it can boot live manjaro usb again. (i also already tried doing "ls, ls (hd0)/" to find the partition with linux but since the partitions are deleted it doesn't work and i have no clue where grub is sitting, also i tried resetting the mbr in cmd and that did not work as well)
Sorry for the long backstory but i figured it was needed to understand
tldr: to uninstall a dual boot with ubuntu i just deleted the partitions, now ubuntu is still an option on my boot menu and when i try to run a bootable linux usb it says unknown filesystem, please help
thanks