Remove unnecessary `Ember::Handlebars::VERSION`
Remove unnecessary `Ember::Handlebars::VERSION`

It couldn't specify from ember-rails because it depends on handlebars-source.

bcavileer/ember-rails,ipmobiletech/ember-rails,maschwenk/ember-rails,bterkuile/ember-rails,kongregate/ember-rails,ipmobiletech/ember-rails,emberjs/ember-rails,bterkuile/ember-rails,emberjs/ember-rails,bcavileer/ember-rails,bcavileer/ember-rails,tricknotes/ember-rails,tricknotes/ember-rails,bterkuile/ember-rails,emberjs/ember-rails,tricknotes/ember-rails,maschwenk/ember-rails,ipmobiletech/ember-rails,kongregate/ember-rails,maschwenk/ember-rails