fix: remove pip install statements (#1546) (#653)
fix: remove pip install statements (#1546) (#653)

because the tools are already installed in the docker image as of https://github.com/googleapis/testing-infra-docker/pull/227
Source-Link: https://github.com/googleapis/synthtool/commit/ab7384ea1c30df8ec2e175566ef2508e6c3a2acb
Post-Processor: c86da0eb35ae387347c523a1f7f5f619652373a7@sha256:bb493bf01d28519e82ab61c490c20122c85a7119c03a978ad0c34b4239fbad15

Co-authored-by: Owl Bot <7f39581e9a7ddb69f3fa3e6fc69a582ea2916fc9@users.noreply.github.com>
Co-authored-by: gcf-merge-on-green[bot] <6c7a4de7cdf40496888e303ea3f489f3cc742362@users.noreply.github.com>
Co-authored-by: losalex <9dd2ac980cdedc4c99c4ef1d8a86d0baa10d5d07@users.noreply.github.com>
googleapis/nodejs-error-reporting,googleapis/nodejs-error-reporting,googleapis/nodejs-error-reporting