Correctly sized void arrays can be needed after parsing has recovered
from an error and the code is trying to evaluate the constant value of
a node. Since now we just have a generic EOpConstruct op instead of
different ops for different types, we can simply remove the special
handling for void arrays in CreateZeroNode to create the arrays in the
correct size.

BUG=chromium:890581
TEST=angle_unittests

Change-Id: I48d96c9ef1d695cd8583a845fd4bd24a7aaf535c
Reviewed-on: https://chromium-review.googlesource.com/c/1264515Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>