Merge pull request kubernetes-sigs#91 from DirectXMan12/infra/fix-bad-gopkg-toml-constraint

Remove kube-aggregator from Gopkg.toml

Author: k8s-ci-robot

Gopkg.toml

@@ -46,9 +46,5 @@ required = ["sigs.k8s.io/testing_frameworks/integration",
   name = "k8s.io/client-go"
   version = "kubernetes-1.10.1"
 
-[[constraint]]
-  name = "k8s.io/kube-aggregator"
-  version = "kubernetes-1.10.1"
-
 [prune]
   go-tests = true