[jackowayed]

That's awkward passive voice. How about "myusername has not listed skills"?

[trouble]

What about "myusername has not listed any skills."?

[kaerast]

Or "myusername has no skills". That way you encourage people to add their skills.

[chrisaycock]

Shorter: "myusername has no listed skills."

[WingForward]

"myusername has listed no skills" sounds better to my ear.