🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

.github/release-please.yml

@@ -1,11 +1,2 @@
 releaseType: python
 handleGHRelease: true
-# NOTE: this section is generated by synthtool.languages.python
-# See https://github.com/googleapis/synthtool/blob/master/synthtool/languages/python.py
-branches:
-- branch: v1
-  handleGHRelease: true
-  releaseType: python
-- branch: v0
-  handleGHRelease: true
-  releaseType: python