Remove error reporter from SkSLVMGenerator

All errors need to be caught earlier, so turn any remaining TODO items
into asserts.

Bug: skia:11127
Change-Id: I6731f947233522df6397b3444c26d5ebc417c431
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/351506
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
1 file changed