[canvaskit] Remove deprecated PathMeasure

This will make cleaning up the PosTan value easier.

Change-Id: I13aa12f94c560bf8539aa2edb1f9e13779635692
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/362458
Reviewed-by: Nathaniel Nifong <nifong@google.com>
5 files changed