Use released arel

Related to 2e0fe592

guides/bug_report_templates/action_controller_master.rb

@@ -15,7 +15,6 @@
   git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
   gem "rails", github: "rails/rails"
-  gem "arel", github: "rails/arel"
 end
 
 require "action_controller/railtie"

guides/bug_report_templates/active_job_master.rb

@@ -15,7 +15,6 @@
   git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
   gem "rails", github: "rails/rails"
-  gem "arel", github: "rails/arel"
 end
 
 require "active_job"

guides/bug_report_templates/active_record_master.rb

@@ -15,7 +15,6 @@
   git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
   gem "rails", github: "rails/rails"
-  gem "arel", github: "rails/arel"
   gem "sqlite3"
 end
 

guides/bug_report_templates/active_record_migrations_master.rb

@@ -15,7 +15,6 @@
   git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
   gem "rails", github: "rails/rails"
-  gem "arel", github: "rails/arel"
   gem "sqlite3"
 end
 

guides/bug_report_templates/benchmark.rb

@@ -15,7 +15,6 @@
   git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
   gem "rails", github: "rails/rails"
-  gem "arel", github: "rails/arel"
   gem "benchmark-ips"
 end
 

guides/bug_report_templates/generic_master.rb

@@ -15,7 +15,6 @@
   git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
   gem "rails", github: "rails/rails"
-  gem "arel", github: "rails/arel"
 end
 
 require "active_support"