[init] Remove outdated email preference for OS X
[init] Remove outdated email preference for OS X

The `copy email addresses as "foo@example.com" instead of "Foo Bar"`
hidden preference no longer work in Mac OS X v10.9.

Ref: mathiasbynens/dotfiles#264.

wingy3181/dotfiles,newtonne/dotfiles,AlbertoElias/dotfiles,b-boogaard/dotfiles,mickael83/ubuntu-dotfiles,EDiLD/dotfiles,christophermoura/dotfiles,wingy3181/dotfiles,stevenirby/dotfiles-1,girishramnani/dotfiles,zlot/dotfiles,mickael83/ubuntu-dotfiles,wingy3181/dotfiles,girishramnani/dotfiles,EDiLD/dotfiles,khornberg/dotfiles,makabde/dotfiles,oddlord/dotfiles,christophermoura/dotfiles,codelandev/init-setup,pbrooks/dotfiles,newtonne/dotfiles,AlbertoElias/dotfiles,zlot/dotfiles,sophatvathana/dotfiles,makabde/dotfiles