remove half float workaround in GrGLGpu::onReadPixels

Change-Id: Ifb30a0b977918d84f5b9d5ea1714d19cc7392e37
Reviewed-on: https://skia-review.googlesource.com/133440
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed