It is fixed in the glslang that the string size expands to 200,
so remove the workaround in the commit 4c7db77e.

Bug: angleproject:4120
Change-Id: Iacc17259a68b3c92763c309a61b7fd87b130edc6
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1936074
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Ian Elliott <ianelliott@google.com>