Remove static SkSL code from ShaderCodeDictionary.

Static SkSL lives in `sksl_graphite_frag.sksl` now. In order to make
changes to the static code, please set `skia_compile_modules = true` in
your GN args.

Change-Id: I5c04f5fc7fdb835d0c3ff6cf6c1b054722ea35d1
Bug: skia:13110
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/532407
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2 files changed