remove compiled devise files

[btbonval]

config/initializers/devise.rb and config/locales/devise.en.yml conflict and must be overridden when running rails g devise:install on a localhost system.

rails g devise:install will generate these files automatically and we have not modified them. It seems that these files are not worth tracking.

Any reason we should leave them in the repo?

[btbonval]

btw rails g devise:install will insert the config.secret_key line, which is due to us using a newer version of devise.

Alternatively, we should find which version of devise is being run upstream and lock that version in the Gemfile so that our source files don't need to be updated at all.