Remove cokane@ from MAINTAINERS for 3dfx(4)/tdfx(4) because their email
addresses on file bounce (see r252463 for more details)

Reviewed by: accounts (dhw)


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275006 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f