Can I cut these wires? Apartment build phone/intercom system
Phone wiring is mostly low voltage, though old-style electromagnetic ringers can briefly kick it up to 90v when ringing. If you really want to just discard this, I'd just cut off the bared copper ends, fold the wire back on itself once so the ends are against the outer sheathing, give it a quick wrap with electrical tape to hold them there (just once or twice around the ends), and shove it back into the wall. 

That may not be the best answer. But it would work, and be fairly easy to undo if you discover you need them after all.