add noexcept to GrAtlasTextOp delete

Change-Id: Icb2d8ce9ac75454b89342aa737d563cf45eaba3e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/379756
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed