Clean up SkBaseDevice::CreateInfo

  - drop unused ctor
  - all layers are kPremul_SkAlphaType -> drop preserveLCDText logic

Change-Id: I24b9d3273ac65d9775714272a75222f36e44a453
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/227643
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
3 files changed