Remove SVN tags from the license file

[leouieda]

Description of proposed changes

Deleted the SVN tags in the LICENSE.TXT file. We don't need the commit hash but should there be a date on top of the document?

Reminders

• Make sure that your code follows our style. Use the other functions/files as a basis.
• Add tests for new features or tests that would have caught the bug that you're fixing.
• Describe changes to function behavior and arguments in a comment below the function declaration.
• If adding new functionality, add a detailed description to the documentation and/or an example.

[PaulWessel]

Agreed. We can add a date later if we feel that is important.