Removes osx::global::open_new_volumes

This was added in the same commit as tap to click
107dedb9d43771eca29a657e1735633d7934d640

Removing it in order to get tap to click merged.
Merge branch 'jstillwell/osx_prefs' of github.com:JohnColvin/puppet-osx into jstillwell/osx_prefs