Deletes a assignment. No expansion will happen. Example: * Organization organizationA contains two projects, project1 and project2. * Reservation res1 exists and was created previously. * CreateAssignment was used previously to define the following associations between entities and reservations: and In this example, deletion of the assignment won't affect the other assignment. After said deletion, queries from project1 will still use res1 while queries from project2 will switch to use on-demand mode.