ST_Subdivide test should only be activated when available

[strk]

See ​https://travis-ci.org/postgis/postgis/builds/122638771#L3628

[pramsey]

(In [14838]) Don't run online test for GEOS 3.5+ feature, closes #3529

[strk]

Should you put that test in the subdivide.sql/subdivide_expect files, already only running when dependencies are met ?

[pramsey]

I can't see building out another online test file for just one test. I'd rather test in the cunit realm where switching on geos version is less intrusive.

[robe]

We already have an online test file - subdivide.sql wouldn't you just move it to that file as strk says instead of just deleting it. I'm just being a concerned pest so feel free to ignore my comment.

[pramsey]

Thanks, good note, moved.