Remove naive verification of tuple size

This verification will not work.
Think of spaces or escaped ?
I think it's easier for users to parse the SQLException

Author: Moritz Schubotz <github@ckurs.de>

Closes #116 from physikerwelt/patch-1 and squashes the following commits:

69a3d2a [Moritz Schubotz] Remove associated test as well
b51b4f0 [Moritz Schubotz] Remove naive verification of tuple size