Review potentially unused Errbit code identified by static analysis #3125

unused 0.4.0 reported the following 19 high-likelihood candidates across 9 files. These are suggestions requiring manual verification, not confirmed dead code.

Findings

• spec/models/error_report_spec.rb
  • API_VERSION
• bin/rails
  • APP_PATH
• app/models/problem.rb
  • attribute_count_decrease
  • merged?
• app/models/user.rb
  • can_create_github_issues?
  • github_login=
  • password_required?
  • watching?
• app/models/app.rb
  • find_by_id!
• spec/errbit_plugin/mock_issue_tracker.rb
  • comments_allowed?
• app/assets/stylesheets/mailers/mailer.css
  • a.bold
  • p.heading
  • p.monospace
  • span.bold
• app/assets/stylesheets/reset.css
  • applet
  • dfn
  • strike
• app/assets/stylesheets/bootstrap.css
  • form-control-lg::-webkit-file-upload-button
  • form-control-sm::-webkit-file-upload-button

Suggested follow-up

Review each candidate against Rails conventions, callbacks, reflection, view usage, routes, JavaScript usage, and test support before removing anything.