remove unused GetAllUsers function

db/node.go

@@ -256,19 +256,6 @@ func (db *DB) CanClose(id string) (bool, []string, error) {
 	return len(blocking) == 0, blocking, nil
 }
 
-func (db *DB) GetAllUsers() ([]string, error) {
-	//TODO: Seperate sql query for performance
-	nodes, err := db.ListNodes(ListFilter{TagPrefixes: []string{"_type::user"}})
-	if err != nil {
-		return nil, err
-	}
-	users := make([]string, len(nodes))
-	for i, n := range nodes {
-		users[i] = n.ID
-	}
-	return users, nil
-}
-
 func (db *DB) GetSubtasks(parentID string) ([]*models.Node, error) {
 	rows, err := db.Query("SELECT to_id FROM rels WHERE from_id = ? AND rel_type = ?", parentID, models.RelSubtask)
 	if err != nil {