[canvaskit] Remove Font.measureText and Font.getWidths

This had been previously deprecated.

Bug: skia:10717
Change-Id: Ic57ed835c13cfa7812099a3ef20ed7ff5aa62f7f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/371339
Reviewed-by: Nathaniel Nifong <nifong@google.com>
9 files changed