Removed memcached per direction from the great and powerful OZ.

I found some references to memcache, but they look unrelated to this cookbook in my opinion.

https://github.com/live-community/live_community_chef_repo/blob/master/cookbooks/intu_lc/templates/default/env.erb#L6 

and here

https://github.com/live-community/live_community_chef_repo/blob/master/vendor/cookbooks/runit/README.md