Remove unused dependency from Gopkg.toml
This change removes the unused dependency
`k8s.io/apiextensions-apiserver` from Gopkg.toml which caused a warning
about it being unused when running `dep ensure`.
This package was no longer needed after and the package was
removed from `vendor/` in
branch = "release-1.14"
name = "k8s.io/api"
-[[constraint]]
- branch = "release-1.14"
- name = "k8s.io/apiextensions-apiserver"
-
[[constraint]]
branch = "release-1.14"
name = "k8s.io/apimachinery"
