Fix strict typecheck errors.

Library/Homebrew/extend/os/linux/cleaner.rb

Library/Homebrew/extend/os/linux/formula_cellar_checks.rb

Library/Homebrew/extend/os/linux/software_spec.rb

Library/Homebrew/extend/os/linux/utils/analytics.rb

Library/Homebrew/extend/os/mac/formula_support.rb

Library/Homebrew/extend/os/mac/hardware.rb

Library/Homebrew/extend/os/mac/missing_formula.rb

Library/Homebrew/extend/os/mac/utils/analytics.rb