Don't search for nonexistent brackets in InitializeVariables
Don't search for nonexistent brackets in InitializeVariables

Array brackets are not included in ShaderVariable::name, so they
don't need to be pruned from there either when using the name to
look up the variable.

BUG=angleproject:2267
TEST=angle_unittests --gtest_filter=*InitOutput*Array*

Change-Id: I2b80a88c1d67f7f0dde12880bcfb35fb6d861cd0
Reviewed-on: https://chromium-review.googlesource.com/909109
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Reviewed-by: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>
Commit-Queue: Olli Etuaho <38ae6c0e2772a20e8e989f80cb8c99d274e44242@nvidia.com>

ppy/angle,ppy/angle,ppy/angle,ppy/angle