Remove `board_new_list` feature flag [RUN ALL RSPEC] [RUN AS-IF-FOSS]
What does this MR do?
Remove board_new_list
feature flag and related code
Deletes tests that either:
- check for existance of the old 'Add list' dropdown
- Create new labels from the 'Add list' dropdown (can't do this anymore)
- update some tests for adding lists to add an extra click (we need to click 'Add list', then open the dropdown to select a label)
Related to #299366 (closed)
Edited by Simon Knox