Remove all layout(ctype=...) from runtime SkSKL

Most of these did nothing, and I'd like to remove the feature. Also, the
benchmark was using 'in uniform' which isn't supported (it asserts in
debug build).

Change-Id: I671ca69fdd50811a2090c7a03f5f23e6b38e6f96
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/260043
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
6 files changed