We are no longer using the Percy service, so this code is not required anymore.
Removes the percy agent, the gem, and all references to Percy.snapshot and percy: true.
* Add Percy to Gemfile, rails helper
* Percy snapshots for using the editor
* Add PERCY_TOKEN to sample_application.yml
* Percy snapshots for visiting the homepage
* Percy snapshots for viewing an article's comments
* Percy snapshots for creating an article
* Percy snapshots for editing an article
* Percy snapshots for logged in/out user
* Remove empty spec file
* Percy snapshots for settings page
* Percy snapshots for reading list
* Percy snapshots for admin view
* Percy snapshots for moderator view
* Percy snapshots for authentication views
* Percy snapshots for article and tag views
* Percy snapshots for editing/deleting comment views
* Percy snapshots for admin views
* Percy snapshots for comment views
* Percy snapshots for organization views
* Percy snapshots for pro membership views
* Percy snapshots for podcast views
* Percy snapshots for user views
* Percy snapshots for dashboard views
* Percy snapshots for homepage views
* Percy snapshots for video views
* Add js: true in tests that require it for Percy
* Percy dependency cleanup
* Add the Percy agent
* Remove the PERCY_TOKEN from sample_application.yml
* Move the Percy gem into the "test" group in the Gemfile
* Remove duplicate snapshots, provide unique names to snapshots
* Set seed on Faker::Config for deterministic Percy snapshots
* Freeze time in js: true tests for determinstic snapshots
* Upgrade Percy to v0.26.3
* Add percy: true flag for Percy snapshotting tests
* Add more percy: true flags
* Initial work for streaming app shell way of using serviceworkers
* Close in on serviceworker adjustment finalization
* Add docs and loading indicator
* Remove useless code
* Don't run on API
* Update app/javascript/contentDisplayPolicy/hideBlockedContent.js
* Fix small details
* Don't run serviceworker.js code in test env
* Fix JS in serviceworker
* Move private keyword to proper place in async controller
* Change shell_version to HEROKU_SLUG_COMMIT
* Update caching config
* Add test for async_info/shell_version
