If you are being bothered by a calendar account that doesn't know where it popped up, then this software is designed for you.
Simple
Only the calendar account list and delete function
Open Source and safe
You can view the source code of the project on GitHub.
https://github.com/Ayagikei/calendar-account-manager
The application does not require network or storage read and write permissions.
Data safety
Safety starts with understanding how developers
collect and share your data. Data privacy and security practices may vary based
on your use, region, and age. The developer provided this information and may
update it over time.