Removed useless modifiersWithDefaults method from DSLParser

This was inherited from SkSLParser, but is never called with anything
other than zero.

Change-Id: I423f943fa5cf9eeb611d1fa7a1e8a8884c8dd912
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/454744
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed