[m-rev.] for review: delete read_term* from term_io.m

[Julien Fischer]

On Fri, 4 Mar 2022, Julien Fischer wrote:

>>  Another question is: should I make tests/general/interpreter.m
>>  read-only, dependent on tests/debugger/interpreter.m, and copied
>>  over from that file (after a temporaryt chmod) if that file ever changes?
>
> There's a relationship between those two and samples/interpreter.m as
> well.

I would also note that all three versions of that code are calling
predicates we obsoleted in 22.01 (e.g. io.see/4).

Julien.