remove dupe Cask sim-pholders.rb, update fields

The dupe under the incorrect name had more up-to-date data,
which is now tranferred to simpholders.rb, the preferred
name according to CONTRIBUTING.md
Merge pull request #2633 from rolandwalker/remove_and_update_sim_pholders

remove dupe Cask sim-pholders.rb, update fields