Codetester bugs and missing features (4332456)

Is there a supported PL/SQL API call to remove all tests or all tests that match filter criteria.
This way it would be possible to delete all tests before re-importing them, especially for people, who generate their tests as xml files and then import these tests.
It would be possible to automatically remove the tests before importing them.
At the moment it is only possible to replace existing tests when new tests are imported, but if a test is obsolete (thus no new test is imported) it will not be cleaned out but the out-of-use tests will stay there until they are cleaned out manually.