easiest thing would be to put a small junction box on or in the wall with the wires terminated inside it, ready for use next time somebody decides to have wall lamps. It must be visible to discourage you from putting a nail or screw in the cable.
It could be done using a flush architrave box and a small white plastic cover that can be painted to match the wall. Don't cut the wires so short that they can't be used.
Otherwise, the cable will need to be isolated at source and if this means cutting chipboard floors, the electrician will get the blame when the floor cracks and breaks. Chipboard is a very inferior material and is prone to cracking and creaking or breaking, even if you don't cut it.
If you can find a good carpenter, you could ask him to take up an entire section of floor and replace it with new, using noggins under all short or cut edges. Flooring ply is usually in sheets 2440x1220mm but he may be able to use a new piece 2440x610mm. It is fairly impossible to use the T&G unless you take up at least one big piece.
When your chipboard has enough cracks and holes in it, you can put it on a bonfire where it belongs and replace with ply, which is much better.
Chipboard will usually last until the builder has banked your cheque, sometimes longer.