[tei-council] example validity

[Syd Bauman]

I just went to fix this. I found that there are 8 <egXML> with @valid
specified:
* correctly valid=feasible
* correctly valid=feasible
* incorrectly valid=feasible, is just valid [1]
* incorrectly valid=feasible, is just valid [2,1]
* correctly valid=feasible
* correctly valid=feasible
* correctly valid=feasible
* correctly valid=feasible

I've now removed the valid-feasible from the two valid examples and
will check-in as soon as my local build finishes (presuming it's OK).

Notes
-----
[1] Although arguably should not be ... P3 never allowed an empty
    <div>.
[2] Only because we still allow numbered <div>s. :-)