Remove a duplicated and commented T3SQLNativeSql definition.

Patch by: me

(cherry picked from commit 72c9a57b)

Change-Id: I2730ede794f750181075b253f62951d47ec82ddc
Reviewed-on: https://gerrit.libreoffice.org/45176Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>