vendor cleanup: remove unused,non-go and test files

vendor/k8s.io/client-go/pkg/version/.gitattributes

@@ -1 +0,0 @@
-base.go export-subst

vendor/k8s.io/client-go/pkg/version/BUILD

@@ -1,30 +0,0 @@
-package(default_visibility = ["//visibility:public"])
-
-load(
-    "@io_bazel_rules_go//go:def.bzl",
-    "go_library",
-)
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "base.go",
-        "doc.go",
-        "version.go",
-    ],
-    importpath = "k8s.io/client-go/pkg/version",
-    deps = ["//vendor/k8s.io/apimachinery/pkg/version:go_default_library"],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [":package-srcs"],
-    tags = ["automanaged"],
-)

vendor/k8s.io/client-go/pkg/version/def.bzl

@@ -1,38 +0,0 @@
-# Copyright 2017 The Kubernetes Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Implements hack/lib/version.sh's kube::version::ldflags() for Bazel.
-def version_x_defs():
-  # This should match the list of packages in kube::version::ldflag
-  stamp_pkgs = [
-      "k8s.io/kubernetes/pkg/version",
-      # In hack/lib/version.sh, this has a vendor/ prefix. That isn't needed here?
-      "k8s.io/client-go/pkg/version",
-      ]
-  # This should match the list of vars in kube::version::ldflags
-  # It should also match the list of vars set in hack/print-workspace-status.sh.
-  stamp_vars = [
-      "buildDate",
-      "gitCommit",
-      "gitMajor",
-      "gitMinor",
-      "gitTreeState",
-      "gitVersion",
-  ]
-  # Generate the cross-product.
-  x_defs = {}
-  for pkg in stamp_pkgs:
-    for var in stamp_vars:
-      x_defs["%s.%s" % (pkg, var)] = "{%s}" % var
-  return x_defs