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>
4 files changed