LLC - one member to leave - what to do with owners equity?

We have a 4 member LLC - each person owning 25%. We have been putting money into the business on a regular basis to cover expenses. Each person's deposit has been added to an individual owner's equity category/account ("Owner's Name - Owner's Equity"). Now, one of the owners is leaving the LLC and will not be replaced. What do I do with the owner that is leaving? No one has taken money out of the LLC (no draw).