What to do with cut wire ends
YOu need to either (1) put small wire nuts on the ends, which would require stripping back the jacket a little, also putting the wire end in a box with an accessible cover, or (2) disconnecting the other end of the wire.
Even if you disconnect the other cable end, it would be a good idea to have both ends in accessible boxes so the wires can be used again in the future (exception for obsolete and/or crumbling very old wires).
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.