Do not apply Sidekiq patch automatically

Deleting many items in the queue via Sidekiq Web UI results in timeouts because each job is being unlocked individually.
Since this change Sidekiq API patch should be applied explicitly in Gemfile:

```ruby
gem 'activejob-uniqueness', require: 'active_job/uniqueness/sidekiq_patch'
```

fixes #16

Author: sharshenov

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - [#22](https://github.com/veeqo/activejob-uniqueness/pull/22) Test with ruby 3.0.1
 
 ### Changed
+- [#20](https://github.com/veeqo/activejob-uniqueness/pull/20) **Breaking** Sidekiq patch is not applied automatically anymore
 - [#21](https://github.com/veeqo/activejob-uniqueness/pull/21) Migrate from Travis to Github Actions
 
 ## [0.1.4](https://github.com/veeqo/activejob-uniqueness/compare/v0.1.3...v0.1.4) - 2020-09-22

README.md

@@ -27,6 +27,11 @@ Add the `activejob-uniqueness` gem to your Gemfile.
 gem 'activejob-uniqueness'
 ```
 
+If you want jobs unlocking for Sidekiq Web UI, require the patch explicitly. [Read more](#sidekiq-api-support)
+```ruby
+gem 'activejob-uniqueness', require: 'active_job/uniqueness/sidekiq_patch'
+```
+
 And run `bundle install` command.
 
 ## Configuration
@@ -119,9 +124,14 @@ gem install wwtd
 wwtd
 ```
 
-## Sidekiq adapter support
+## Sidekiq API support
 
-ActiveJob::Uniqueness patches Sidekiq API to unset locks on jobs cleanup. Starting Sidekiq 5.1 job death also triggers locks cleanup.
+ActiveJob::Uniqueness supports Sidekiq API to unset job locks on queues cleanup (e.g. via Sidekiq Web UI). Starting Sidekiq 5.1 job death also triggers locks cleanup.
+Take into account that **[big queues clanup becomes much slower](https://github.com/veeqo/activejob-uniqueness/issues/16)** because each job is being unlocked individually. In order to activate Sidekiq API patch require it explicitly in your Gemfile:
+
+```ruby
+gem 'activejob-uniqueness', require: 'active_job/uniqueness/sidekiq_patch'
+```
 
 ## Contributing
 

lib/active_job/uniqueness.rb

@@ -8,14 +8,6 @@
 require 'active_job/uniqueness/log_subscriber'
 require 'active_job/uniqueness/active_job_patch'
 
-begin
-  require 'sidekiq/api'
-rescue LoadError
-  # ¯\_(ツ)_/¯
-else
-  require 'active_job/uniqueness/sidekiq_patch'
-end
-
 module ActiveJob
   module Uniqueness
     extend ActiveSupport::Autoload

lib/active_job/uniqueness/sidekiq_patch.rb

@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 
+require 'activejob/uniqueness'
+require 'sidekiq/api'
+
 module ActiveJob
   module Uniqueness
     def self.unlock_sidekiq_job!(job_data)

spec/spec_helper.rb

@@ -1,9 +1,16 @@
 # frozen_string_literal: true
 
 require 'bundler/setup'
-require 'active_job/uniqueness'
 require 'pry-byebug'
 
+begin
+  require 'sidekiq/api'
+rescue LoadError
+  require 'active_job/uniqueness'
+else
+  require 'active_job/uniqueness/sidekiq_patch'
+end
+
 Dir['./spec/support/**/*.rb'].sort.each { |f| require f }
 
 RSpec.configure do |config|