Same with TOWER before departure awaiting takeoff clearance, not needed. Especially in the morning Melbourne peak when we have A380's, 747s, 777s all departing at the same time. So I wonder if Tower gives a rats about a QF 767 declaring they are heavy considering 34 is long enough for most types, let alone Qantas going to Sydney.
The only heavy calls I hear are from the 767s.