Removed file field from SkSL::Position

Bug: skia:13051
Change-Id: I13cdb1b625f65e6d15d3b59ba493897ed88b24c4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/521005
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
4 files changed