Part of MDL-67673 and MDL-64600, phpunit/dbunit was removed from core (because it was not available anymore). That implied removing some advanced_testcase methods using it and switching to our own phpunit_dataset class.

The methods to be completely removed here are:

• createXMLDataSet()
• createCsvDataSet()
• createArrayDataSet()
• loadDataSet()

and, also, the associated unit tests covering the current deprecation debugging.

In lib/upgrade.txt you can find information about the deprecation replacements.

At the end, there shouldn't be any occurrence of any of the above in core (or "DBUnit" / "dbunit" in general).