Remove accessRenderTarget call in SkGpuDevice ctor This is a follow up to https://skia-review.googlesource.com/c/4929/ (Guard against instantiate & accessRenderTarget failures). Rather than guard this call to accessRenderTarget I would prefer to remove it. GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4961 BUG=665681,665500,665621 Change-Id: I2c9ec245491d9059de892b2e6a7d4a4de4accdfd Reviewed-on: https://skia-review.googlesource.com/4961 Commit-Queue: Robert Phillips <robertphillips@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com>