Retire nodejs/ci-config-travis

[dominykas]

Seems nodejs/ci-config-travis#23 has two nods - but I figure the final decision probably belongs here?

[mhdawson]

+1 from me, sorry for the late reply.

[rxmarbles]

+1

[bjohansebas]

+1

[bjohansebas]

It looks like there is consensus, @nodejs/tsc. Could you please archive https://github.com/orgs/nodejs/teams/ci-config-travis-maintainers?