Removed Templates checkbox from PR template

Author: Bart Koelman

.github/PULL_REQUEST_TEMPLATE.md

@@ -7,4 +7,3 @@ Closes #{ISSUE_NUMBER}
 - [ ] Complies with our [contributing guidelines](./.github/CONTRIBUTING.md)
 - [ ] Adapted tests
 - [ ] Documentation updated
-- [ ] Created issue to update [Templates](https://github.com/json-api-dotnet/Templates/issues/new): {ISSUE_NUMBER}