Depending on the urgency of your need to settle it, I think the best way to “remove” is to dispute it with whichever credit bureau(s) are reporting it. There’s a good chance that the investigation will return no information and the item will be deleted at no cost to you. There’s also a chance that the creditor has gone out of business, was bought by another company, is in bankruptcy, or the supporting documentation is illegible, lost or unrecoverable. There might even be fraud, as in the case of some mortgage debt or the Wells Fargo accounts, but those seem to be mostly settled now.
Another option it to pay the debtor with the stipulation that it be immediately reported to all the bureaus and that you get a paid-in-full letter from the creditor.
You could also wait out the seven years and ensure that the bureaus delete the record timely. Many do not, and you could have a cause of action thereto.
More complex and costly are your own court actions either in equity or by right as in the case of a fair debt action.
If you want to take a chance and know how to file an equitable claim in your local court, you could sue the creditor and hope that they don’t show up or can’t substantiate the debt. There may be legal remedies as well, including statutory damages. You could hire a lawyer to do the same, but it would be costly ($1500 or more @ $300 an hour) to do so.