If you mean the tabs for the brackets to attach?, cut them off with a 4" diamond cutting blade; have eye protection and shop vac hose tied off near cut to cut down dust; hold up on very slight angle to avoid cutting into rim edge of sink top. Silicone that edge down with some weight on top until silicone sets up.
This is known as a vented tap.
The valve part of the hot water tap operates on the mains pressure cold water inlet to the heater.
The outlet part of the hot water tap is vented i.e. always open, so the hot water can expand and relieve pressure without restriction.
Because these local water heaters are often open systems, i.e. the increased pressure from heated water must not damage the installation. The pressure of the water net is only up to the faucet valve. After that valve it is in contact with the normal air (pressure) and flows to the heater, back to the faucet valve where it can be mixed with the cold water. ...
I found a good explanation at:
The filter (possibly Reverse Osmosis) part has a drain pipe.
But it doesn't go directly to the drain.
Goes up to the tap base, where it dribbles in the open air (the "air gap") and back down through the other pipe to drain away.
If the second drain line becomes blocked, ...