Simplify excluded_settings test

test/new_relic/agent/configuration/manager_test.rb

@@ -533,20 +533,8 @@ def test_unsatisfied_values_stay_cached
  def test_logger_does_not_receive_excluded_settings
  log = with_array_logger(:debug) { @manager.log_config('direction', 'source') }.array.join('')
 
- # TODO: OLD RUBIES - RUBY_VERSION < 3.4
- # The JSON string output changed in Ruby 3.4 to remove the hash rocket
- # Pre Ruby 3.4:
- # :app_name=>\"test\"
- # Ruby 3.4+:
- # app_name: \"test\"
- # Remove the condition once we support only version 3.4+
- if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('3.4.0')
- assert_includes(log, 'app_name:')
- refute_includes(log, 'license_key:')
- else
- assert_includes(log, ':app_name')
- refute_includes(log, ':license_key')
- end
+ assert_includes(log, 'app_name')
+ refute_includes(log, 'license_key')
  end
 
  def test_reset_cache_return_early_for_jruby