Cannot unset default InverseMethods in Style/InverseMethods

[dduugg]

The default setting of Style/InverseMethods includes:

Style/InverseMethods:
  InverseMethods:
    :any?: :none?
    :even?: :odd?
    :==: :!=
    :=~: :!~
    :<: :>=
    :>: :<=

I would like to unset the :< and :> entries, as the inverse methods are not correct when comparing classes, e.g.

!(Integer < String)

is not equivalent to

Integer >= String

In reading #4289 as well as https://github.com/rubocop-hq/rubocop/blob/master/manual/configuration.md#inheritance-of-hashes-vs-other-types my understanding is that i should be able to unset them with:

Style/InverseMethods:
  InverseMethods:
    :<: ~
    :>: ~

---

Expected behavior

I would expect the above to result in (via rubocop --show-cops):

Style/InverseMethods:
  InverseMethods:
    :any?: :none?
    :even?: :odd?
    :==: :!=
    :=~: :!~

Actual behavior

Instead the result is:

Style/InverseMethods:
  InverseMethods:
    :any?: :none?
    :even?: :odd?
    :==: :!=
    :=~: :!~
    :<:
    :>:

This will continue to erroneously flag code such as !(a < b) (which, in addition, is autocorrected to a b).

Steps to reproduce the problem

I have written a failing test to capture the desired behavior:

context 'when a file inherits and overrides a hash with nil' do
  let(:file_path) { '.rubocop.yml' }

  before do
    create_file('.rubocop_parent.yml', <<-YAML.strip_indent)
      Style/InverseMethods:
        InverseMethods:
          :any?: :none?
          :even?: :odd?
          :==: :!=
          :=~: :!~
          :<: :>=
          :>: :<=
    YAML

    create_file('.rubocop.yml', <<-YAML.strip_indent)
      inherit_from: .rubocop_parent.yml

      Style/InverseMethods:
        InverseMethods:
          :<: ~
          :>: ~
          :foo: :bar
    YAML
  end

  it 'removes hash keys with nil values' do
    inverse_methods =
      configuration_from_file['Style/InverseMethods']['InverseMethods']
    expect(inverse_methods).to eq(
      '==': :!=,
      '=~': :!~,
      any?: :none?,
      even?: :odd?,
      foo: :bar
    )
  end
end

RuboCop version

0.67.2