code: @Procedure(mode = Mode.WRITE)
      @Description("apoc.index.removeRelationshipByName('name',rel) remove relationship from an index for the given name")
      public void removeRelationshipByName(@Name("name") String name, @Name("relationship") Relationship rel) {
          RelationshipIndex index = getRelationshipIndex(name, null);
          index.remove(rel);
      }
docs: CALL apoc.index.removeRelationshipByName('name', checkin)