[graphite] Remove unused parameter in AtlasProvider method

`AtlasProvider::crateComputePathAtlas()` no longer needs a Recorder
parameter. Previously this was used to query for compute support which
now gets queried and stored in a flag in its constructor.

Change-Id: If3521b790ad2058cab6f645ca8fc302cfd3b7190
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/759676
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Arman Uguray <armansito@google.com>
3 files changed