This warning is inhibited from 80Kts until Lift Off...
It's not recommended to reject the take-off as you will lost all reversers/ Spoilers 1 2 and 5 and Normal braking.
In that case you will not have enough runway length to stop safely.
Better to get airbone with you Stanbby Instrument, retract the gear.
You will stay in Alternate Law (Not really hard to fly the aircraft in such configuration).
As soon as the RAT is deployed you will recover PDF1 ND1 and Upper ECAM, enough to manage the flight and come back on a long runway to stop the plane.