:llvm is deprecated

when running `brew install zoidbergwill/python/python35`
```
Warning: Calling fails_with :llvm is deprecated!
There is no replacement.
/usr/local/Homebrew/Library/Taps/zoidbergwill/homebrew-python/python35.rb:61:in `<class:Python35>'
Please report this to the zoidbergwill/python tap!
```

