Revert "Try to be more precise in the Ruby 2.2 version for OS X."
Revert "Try to be more precise in the Ruby 2.2 version for OS X."

This reverts commit b6188ca29b89af2b41f841a58842ef8e481486ed.

kachick/rubyspec,sgarciac/spec,BanzaiMan/rubyspec,wied03/rubyspec,eregon/rubyspec,lucaspinto/rubyspec,kidaa/rubyspec,kachick/rubyspec,ruby/spec,sgarciac/spec,ruby/spec,eregon/rubyspec,iliabylich/rubyspec,jannishuebl/rubyspec,kidaa/rubyspec,benlovell/rubyspec,nobu/rubyspec,iliabylich/rubyspec,eregon/rubyspec,ruby/rubyspec,kachick/rubyspec,bl4ckdu5t/rubyspec,wied03/rubyspec,nobu/rubyspec,askl56/rubyspec,ruby/spec,benlovell/rubyspec,jannishuebl/rubyspec,wied03/rubyspec,ruby/rubyspec,yous/rubyspec,bl4ckdu5t/rubyspec,lucaspinto/rubyspec,sgarciac/spec,BanzaiMan/rubyspec,yous/rubyspec,nobu/rubyspec,askl56/rubyspec