build(python): remove python 3.7 from kokoro Dockerfile#689

Merged

gcf-merge-on-green[bot] merged 3 commits intomasterfrom owl-bot-update-lock-5ff7446edeaede81c3ed58b23a4e76a5403fba1350ce28478045657303b6479d

Jul 14, 2021

+3-79

Commits on Jul 14, 2021