DEPR: Removing previously deprecated flavor parameter from SQLiteData…
…base (#6581)

- [X] related to #6581
- [X] tests added / passed
- [X] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [X] whatsnew entry

hmm, these are not building on travis for some reason. It's a great reason for you to take a break today, it's Sunday! ;) thanks!