Remove really outdated zsh-completion REVIEWERS file
Remove really outdated zsh-completion REVIEWERS file

Signed-off-by: Tianon Gravi <4b2b69742da531f1900c4c4748d7a0ecda59626a@gmail.com>

thaJeztah/cli,thaJeztah/cli,docker/cli,cpuguy83/cli,docker/cli,cpuguy83/cli