cassandra: Remove `uses_from_macos "python@2"` as Python 2 is dead
cassandra: Remove `uses_from_macos "python@2"` as Python 2 is dead

- This formula is `depends_on :macos` because of the Python 2
  requirement. Homebrew on Linux no longer provides the `python@2`
  formula.

Linuxbrew/homebrew-core,maxim-belkin/homebrew-core,rwhogg/homebrew-core,Linuxbrew/homebrew-core,rwhogg/homebrew-core,maxim-belkin/homebrew-core