It's an old event, perhaps some experimenting I did when FCPX first came out. Now I want to make something of the footage. I somehow deleted some event files outside of FCPX--title and credit videos--but I do not need them for the project. How can I make FCPX forget that they were ever in the event, i.e., not show them when I select "Relink Event Files?" Thanks!
Oops! Answered my own question. The Event Browser must be set to show All Clips. Mine was set to Hide Rejected. With All Clips showing the missing event files are shown entirely in red and may be deleted. Thanks!