I don't think it means cut..
If you're referring to the red x
markings in our Reference Circuitry Schematics, see below, then as @RK correctly points out they mean N.C , i.e. No Connection.
Which schematic is this? It looks like it is from one of our nRF51 or nRF52 DKs?
Which schematic is this? It looks like it is from one of our nRF51 or nRF52 DKs?