Is it safe to delete a partition containing unsuccessful win 7 install

I made a 100gb partition because I was going to try and install Windows 7 and have it as a 2nd OS along side Windows 10, but about half way through the computer restarted and I can't boot into Windows Setup. That's fine, I changed the default OS and made Windows 10 be chosen instantly on startup. Although in disk management the (Windows 10) Windows C: partition says Boot, I'm not really sure whether or not it's safe to delete the Windows 7 partition. Could somebody please help me out with this. Here is a screen shot of Disk Management if it helps.

Yes, it is safe to delete the Windows 7 partition. The partition marked as active is the one which contains the boot files, and that would appear to be your first partition "EFI System".