remove checkbox for legal stuff that is now covered by the automated PR comment

Author: iOvergaard

.github/pull_request_template.md

@@ -27,5 +27,4 @@
 
 - [ ] If my change requires a change to the documentation, I have updated the documentation in this pull request.
 - [ ] I have read the **[CONTRIBUTING](<(https://github.com/umbraco/Umbraco.UI/blob/dev/docs/CONTRIBUTING.md)>)** document.
-- [ ] I confirm that to my knowledge the contribution looks original and that the [contributor is presumably allowed to share it](https://github.com/umbraco/Umbraco.UI/blob/dev/docs/CONTRIBUTING.md#ownership-and-copyright).
 - [ ] I have added tests to cover my changes.