We should remove this Behat test feature file, because it doesn't serve any purpose:

1. It duplicates scenarios that already exist in reportbuilder (or are covered elsewhere in unit tests) [*];
2. The report source is already itself entirely covered by unit tests;
3. It's an ongoing maintenance burden if interface elements and/or language strings change in reportbuilder

[*] There is one valuable part of the current scenario, which is aggregated column sorting - however it tests only one type, so make sure we cover the same in aggregation unit tests