```ruby
# encoding: utf-8

module Rubocop
  module Cop
    module VariableInspector
      # This class represents each reference of a variable.
      class Reference
        include Locatable

        attr_reader :node, :scope

        def initialize(node, scope)
          # unless VARIABLE_ASSIGNMENT_TYPES.include?(node.type)
          #   fail ArgumentError,
          #        "Node type must be any of #{VARIABLE_ASSIGNMENT_TYPES}, " +
          #        "passed #{node.type}"
          # end

          @node = node
          @scope = scope
        end
      end
    end
  end
end
```

Fix an ad-hoc comment out
user
```ruby
# encoding: utf-8

module Rubocop
  module Cop
    module VariableInspector
      # This class represents each reference of a variable.
      class Reference
        include Locatable

        VARIABLE_REFERENCE_TYPES = (
          [VARIABLE_REFERENCE_TYPE] +
          OPERATOR_ASSIGNMENT_TYPES +
          [ZERO_ARITY_SUPER_TYPE]
        ).freeze

        attr_reader :node, :scope

        def initialize(node, scope)
          unless VARIABLE_REFERENCE_TYPES.include?(node.type)
            fail ArgumentError,
                 "Node type must be any of #{VARIABLE_REFERENCE_TYPES}, " +
                 "passed #{node.type}"
          end

          @node = node
          @scope = scope
        end
      end
    end
  end
end
```
assistant