Drop sidekiq (#411)

* Drop sidekiq

* Drop other references to sidekiq

Author: coorasse

SUMMARY.md

@@ -43,7 +43,6 @@
     - [Send Emails](ruby_on_rails/send_emails.md)
     - [Sparkpost & Mailtrap](sparkpost_and_mailtrap.md)
     - [Devise](ruby_on_rails/devise.md)
-    - [Sidekiq](ruby_on_rails/sidekiq.md)
     - [Cucumber](ruby_on_rails/cucumber.md)
     - [Amazon S3 and Cloudfront](ruby_on_rails/aws.md)
     - [Bootstrap](ruby_on_rails/bootstrap.md)

ruby_on_rails/README.md

@@ -60,7 +60,6 @@ useful services:
 1. [Send emails](send_emails.md)
 1. [Sparkpost & Mailtrap](../sparkpost_and_mailtrap.md)
 1. [Devise](devise.md)
-1. [Sidekiq](sidekiq.md)
 1. [Cucumber](cucumber.md)
 1. [Amazon S3 and Cloudfront](aws.md)
 1. awesome_print `gem 'awesome_print'`

ruby_on_rails/sentry.md

@@ -30,7 +30,6 @@ The different environments will be automatically detected, and you can monitor a
   group :production do
     gem "sentry-rails"
     gem "sentry-ruby"
-    gem "sentry-sidekiq" # If the project uses Sidekiq for background jobs
   end
   ```