Implement word 'delete'

[frostburn]

Python semantics on arrays:

(* Pop the second entry in the current scale and shift subsequent entries back by one. *)
delete $[1]

Python/JS semantics on records:

const rec = {foo: 1, bar: 2}
delete rec['foo']
(* rec = {bar: 2} *)

[frostburn]

Let's call it del instead.