Unselecting from 'Available languages' doesn't drop respective locale views from DB
Steps to replicate the issue:
- Add more than one language from 'Add Language' list say English and French(Canada)
- Then change civi instance to multilingual
- DB creates views with locale suffix en_US and fr_CA
- Now unselect French(Canada) and save
Bug: This doesn't drop the fr_CA views from DB as it is not required.
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