It boots straight into Win7. That's all I've left on the boot menu using
EasyBCD. I've also managed to shrink the obsolete Win8 partition quite a
bit and delete most files on it, but I want to get rid of it completely.
I've posted snapshots of my Disk Management ten minutes ago to Paul's
post below. They show the story well enough.
As someone mentioned earlier, edit the partition table and you can
then do as you please with it.