build: update README for deprecation notice and delete all files exce…

…pt samples (#557)

packages/google-cloud-oslogin/README.md

@@ -1,3 +1,4 @@
+'**_THIS REPOSITORY IS DEPRECATED. ALL OF ITS CONTENT AND HISTORY HAS BEEN MOVED TO [GOOGLE-CLOUD-NODE](https://github.com/googleapis/google-cloud-node/tree/main/packages/google-cloud-oslogin)_**'
 [//]: # "This README.md file is auto-generated, all changes to this file will be lost."
 [//]: # "To regenerate it, use `python -m synthtool`."
 <img src="https://avatars2.githubusercontent.com/u/2810941?v=3&s=96" alt="Google Cloud Platform logo" title="Google Cloud Platform" align="right" height="96" width="96"/>

packages/google-cloud-oslogin/owlbot.py

@@ -0,0 +1,19 @@
+# Copyright 2022 Google LLC
+#
+# 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
+#
+#     https://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.
+
+import synthtool.languages.node as node
+
+node.owlbot_main(templates_excludes=[
+README.md'
+])