TOOLS : Remove usage of DBG_CTOR and DBG_DTOR.

Valgrind is capable of detecting such bugs. No need for extra macros.

Change-Id: Id75ca6991af0bf75e979c7bc2da452f323f389ea
Reviewed-on: https://gerrit.libreoffice.org/7531
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>