How to delete non-Qubes partition and make that space available to Qubes?

I have a partition of my HD which I don’t need anymore. How can I make that space available to Qubes?

When I click on “Qubes devices” icon on the top right it appears as

dom0:nvme1n1p3()

I have deleted partitions in linux before. But I want to make sure that space becomes available to Qubes.