Fix HOMEBREW_RUBY_WARNINGS="-w"

Library/Homebrew/brew.rb

Library/Homebrew/build_environment.rb

Library/Homebrew/cask/lib/hbc.rb

Library/Homebrew/cask/lib/hbc/artifact/abstract_uninstall.rb

Library/Homebrew/cask/lib/hbc/container/bzip2.rb

Library/Homebrew/cask/lib/hbc/container/cab.rb

Library/Homebrew/cask/lib/hbc/container/dmg.rb

Library/Homebrew/cask/lib/hbc/container/generic_unar.rb

Library/Homebrew/cask/lib/hbc/container/gpg.rb

Library/Homebrew/cask/lib/hbc/container/gzip.rb

Library/Homebrew/cask/lib/hbc/container/lzma.rb

Library/Homebrew/cask/lib/hbc/container/tar.rb

Library/Homebrew/cask/lib/hbc/container/xar.rb

Library/Homebrew/cask/lib/hbc/container/xz.rb

Library/Homebrew/cask/lib/hbc/dsl.rb

Library/Homebrew/cask/lib/hbc/locations.rb

Library/Homebrew/cask/lib/hbc/macos.rb

Library/Homebrew/caveats.rb

Library/Homebrew/cmd/--repository.rb

Library/Homebrew/cmd/cleanup.rb