Deleted .dsv files and added to ignore-list

[TommiPrami]

DSV files contains local info also. It's better make it bit harder to add them by accident.

Summary by Bito

• Removes .dsv files that contain local configuration information, addressing sensitive data handling and enhancing security.
• Adds .dsv files to an ignore list to prevent their accidental inclusion in future commits.
• These changes improve the maintainability of the project.
• Overall, this change enhances the project's security and maintainability by addressing sensitive data handling.