Delete unused method `error_certainly_bad_python_version?` (#7739) #577

Job	Run time
date-version	1s
Deploy (bundler, bundler)	41s
Deploy (cargo, cargo)	44s
Deploy (composer, composer)	31s
Deploy (docker, docker)	28s
Deploy (elm, elm)	27s
Deploy (git_submodules, gitsubmodule)	42s
Deploy (github_actions, github-actions)	35s
Deploy (go_modules, gomod)	45s
Deploy (gradle, gradle)	33s
Deploy (hex, mix)	36s
Deploy (maven, maven)	25s
Deploy (npm_and_yarn, npm)	39s
Deploy (nuget, nuget)	27s
Deploy (pub, pub)	47s
Deploy (python, pip)	13m 30s
Deploy (swift, swift)	1m 1s
Deploy (terraform, terraform)	27s
	23m 19s

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