```ruby
# frozen_string_literal: true

require 'yaml'

require 'feature_flagger/version'
require 'feature_flagger/storage/redis'
require 'feature_flagger/control'
require 'feature_flagger/model'
require 'feature_flagger/model_settings'
require 'feature_flagger/feature'
require 'feature_flagger/key_resolver'
require 'feature_flagger/configuration'
require 'feature_flagger/manager'
require 'feature_flagger/feature_keys_migration'
require 'feature_flagger/railtie'

module FeatureFlagger
  class << self
    def configure
      @@configuration = nil
      @@control = nil
      yield config if block_given?
    end

    def config
      @@configuration ||= Configuration.new
    end

    def control
      @@control ||= Control.new(config.storage)
    end

    def migrate_feature_keys
      FeatureKeysMigration.new(control).call
    end
  end
end
```

Remove interface used to expose migration code
user
```ruby
# frozen_string_literal: true

require 'yaml'

require 'feature_flagger/version'
require 'feature_flagger/storage/redis'
require 'feature_flagger/control'
require 'feature_flagger/model'
require 'feature_flagger/model_settings'
require 'feature_flagger/feature'
require 'feature_flagger/key_resolver'
require 'feature_flagger/configuration'
require 'feature_flagger/manager'
require 'feature_flagger/feature_keys_migration'
require 'feature_flagger/railtie'

module FeatureFlagger
  class << self
    def configure
      @@configuration = nil
      @@control = nil
      yield config if block_given?
    end

    def config
      @@configuration ||= Configuration.new
    end

    def control
      @@control ||= Control.new(config.storage)
    end
  end
end
```
assistant