Is it safe to delete the system partition from a drive that has an unused Windows install?

Disk 1 is where my C: drive and current Windows installation is, and I plan on completely reformatting Disk 0 to be used solely for storage, though it has a Windows installation from an older PC. I'm pretty sure this system partition was in use only by that old PC but I would like some way to confirm it won't break shit on my current PC if I delete it.