Remove SkSurface::MakeFromBackendTextureAsRenderTarget

Bug: skia:9832
Change-Id: I4cb6f8abdb58ac37e9304a4c484e6cac4a25f0d2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324890
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
24 files changed