remove kube-aggregator from bazel until we can build it

build/BUILD

@@ -63,10 +63,6 @@ DOCKERIZED_BINARIES = {
         "base": ":busybox-libc",
         "target": "//plugin/cmd/kube-scheduler:kube-scheduler",
     },
-    "kube-aggregator": {
-        "base": ":busybox-libc",
-        "target": "//vendor/k8s.io/kube-aggregator:kube-aggregator",
-    },
     "kube-proxy": {
         "base": ":busybox-net",
         "target": "//cmd/kube-proxy:kube-proxy",

build/release-tars/BUILD

@@ -69,7 +69,6 @@ NODE_TARGETS = [
 # since we include them in the actual build rule.
 SERVER_TARGETS = [
     "//cmd/hyperkube",
-    "//vendor/k8s.io/kube-aggregator",
     "//cmd/kube-apiserver",
     "//cmd/kube-controller-manager",
     "//cmd/kube-discovery",