Drop brew vim package options

Removed in Homebrew/homebrew-core#34421

Of note: this drops Python 2 support.

Author: jeffbyrnes

brew.sh

@@ -38,7 +38,8 @@ brew install wget
 brew install gnupg
 
 # Install more recent versions of some macOS tools.
-brew install vim --with-override-system-vi
+brew install vim
+echo 'If you would like to map vi so it opens the brew-installed vim: ln -s /usr/local/bin/vim /usr/local/bin/vi'
 brew install grep
 brew install openssh
 brew install screen