Support notes indicate I should be able to un-link dependencies by clicking an ‘x’ on rollover.
On this page: https://asana.com/guide/help/tasks/dependencies
Asana Tip: To remove a dependency, hover over an existing indication banner and click the X symbol that appears.
I see a pop-up but no ‘x’ to delete or allow re-assignment.
Browser - Safari on Mac current version 12.0.3