`unlint-non-existing-defect` still generates warnings despite being disabled

This is what we do:

```java
new Program(pkg).without("unlint-non-existing-defect").defects();
```

However, we still receiving this:

```text
foo:11 Unlinting rule 'redundant-object:18' doesn't make sense, since there are no defects with it (unlint-non-existing-defect (Single))
```

I believe we need to fix it