Use buildozer to remove deprecated automanaged tags

pkg/controller/namespace/BUILD

@@ -13,7 +13,6 @@ go_library(
         "doc.go",
         "namespace_controller.go",
     ],
-    tags = ["automanaged"],
     deps = [
         "//pkg/controller:go_default_library",
         "//pkg/controller/namespace/deletion:go_default_library",

pkg/controller/namespace/deletion/BUILD

@@ -11,7 +11,6 @@ load(
 go_library(
     name = "go_default_library",
     srcs = ["namespaced_resources_deleter.go"],
-    tags = ["automanaged"],
     deps = [
         "//vendor/github.com/golang/glog:go_default_library",
         "//vendor/k8s.io/api/core/v1:go_default_library",
@@ -32,7 +31,6 @@ go_test(
     name = "go_default_test",
     srcs = ["namespaced_resources_deleter_test.go"],
     library = ":go_default_library",
-    tags = ["automanaged"],
     deps = [
         "//pkg/api:go_default_library",
         "//vendor/k8s.io/api/core/v1:go_default_library",