delete some variables after Homebrew 2.7.0 is released.

dev-cmd/bump: increase test coverage

build(deps): bump simplecov from 0.20.0 to 0.21.2 in /Library/Homebrew

install: add workaround for rosetta2 path error to msg

cmd/update: suppress curl warnings in certain envs

Generate zsh completions automatically

Bumps [simplecov](https://github.com/simplecov-ruby/simplecov) from 0.20.0 to 0.21.2.
- [Release notes](https://github.com/simplecov-ruby/simplecov/releases)
- [Changelog](https://github.com/simplecov-ruby/simplecov/blob/main/CHANGELOG.md)
- [Commits](https://github.com/simplecov-ruby/simplecov/compare/v0.20.0...v0.21.2

)

Signed-off-by: dependabot[bot] <support@github.com>

build(deps): bump codecov from 0.3.0 to 0.4.0 in /Library/Homebrew

build(deps): bump sorbet from 0.5.6231 to 0.5.6239 in /Library/Homebrew

Bumps [sorbet](https://github.com/sorbet/sorbet) from 0.5.6231 to 0.5.6239.
- [Release notes](https://github.com/sorbet/sorbet/releases)
- [Commits](https://github.com/sorbet/sorbet/commits

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [codecov](https://github.com/codecov/codecov-ruby) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/codecov/codecov-ruby/releases)
- [Changelog](https://github.com/codecov/codecov-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-ruby/compare/v0.3.0...v0.4.0

)

Signed-off-by: dependabot[bot] <support@github.com>

sorbet: Update RBI files.

version: mark methods as public

Autogenerated by the [sorbet](https://github.com/Homebrew/brew/blob/master/.github/workflows/sorbet.yml) workflow.

bump-formula-pr: improvements

named_args: raise error if formula/cask is found but unreadable

Specifically the warning:
`Failed to set filetime <unixtime> on outfile: Operation not permitted`
when the user's `.curlrc`  contains `--remote-time` and the server 
returned a `Last-Modified:` header, like in case of the GitHub API.

Co-Authored-By: Jonathan Chang <me@jonathanchang.org>
Co-Authored-By: Eric Knibbe <3324775+EricFromCanada@users.noreply.github.com>

Don't have a period within first full sentence of the description

livecheck: split cask versions into sub-versions

Incorporate suggested wording

Co-authored-by: Mike McQuaid <mike@mikemcquaid.com>

version: add new `Version::Parser` class

homebrew_bootsnap: fix brew tests.