Remove test for safety configuration of cops documented with @safety YARD tag

This is because in some cases, even when a safety tag is present, `safe` may be `false` or `set_autocorrect` may be `true`.
- https://github.com/rubocop/rubocop-rspec/blob/e63ee9a79c17be296d41ac36dc006d94d6d12069/lib/rubocop/cop/rspec/example_wording.rb#L13-L25

Author: ydah

spec/project/default_config_spec.rb

@@ -102,18 +102,4 @@ def cop_configuration(config_key)
       )
     end
   end
-
-  it 'is expected that all cops documented with `@safety` are `Safe: false` ' \
-     'or `SafeAutoCorrect: false`' do
-    unsafe_cop_names.each do |cop_name|
-      unsafe = default_config[cop_name]['Safe'] == false ||
-        default_config[cop_name]['SafeAutoCorrect'] == false
-      expect(unsafe).to(
-        be(true),
-        "`#{cop_name}` cop should be set `Safe: false` or " \
-        '`SafeAutoCorrect: false` because `@safety` YARD tag exists.'
-      )
-      YARD::Registry.clear
-    end
-  end
 end