Trace_Domain, implement query_remove(), not tested:
- Add _all_trace_levels[], _all_instance_levels[], and
  _all_methods_instance_levels[] to keep track of all expressions levels

- query_clear(): initialize _all_trace_levels[], _all_instance_levels[], and _all_methods_instance_levels[]

- query_default():
  - use query_clear() to initialize all private instance attributes
  - initialize _all_trace_levels[], _all_instance_levels[], and _all_methods_instance_levels[]

- query_add():
  - update _all_trace_levels[], _all_instance_levels[], and _all_methods_instance_levels[]

- Implement query_remove()