```ruby
module Mobility
  module Sequel
=begin

Internal class used to force Sequel model to notice changes when mobility
setter method is called.

=end
    class ColumnChanges < Module
      # @param [Array<String>] attributes Backend attributes
      def initialize(attributes)
        @attributes = attributes

        attributes.each do |attribute|
          define_method "#{attribute}=".freeze do |value, **options|
            if !options[:super] && send(attribute) != value
              locale = options[:locale] || Mobility.locale
              column = attribute.to_sym
              column_with_locale = :"#{attribute}_#{Mobility.normalize_locale(locale)}"
              @changed_columns = changed_columns | [column, column_with_locale]
            end
            super(value, **options)
          end
        end
      end
    end
  end
end
```

Remove unneeded variable assignment in ColumnChanges
user
```ruby
module Mobility
  module Sequel
=begin

Internal class used to force Sequel model to notice changes when mobility
setter method is called.

=end
    class ColumnChanges < Module
      # @param [Array<String>] attributes Backend attributes
      def initialize(attributes)
        attributes.each do |attribute|
          define_method "#{attribute}=".freeze do |value, **options|
            if !options[:super] && send(attribute) != value
              locale = options[:locale] || Mobility.locale
              column = attribute.to_sym
              column_with_locale = :"#{attribute}_#{Mobility.normalize_locale(locale)}"
              @changed_columns = changed_columns | [column, column_with_locale]
            end
            super(value, **options)
          end
        end
      end
    end
  end
end
```
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