Remove unused SkBitmap::RLEPixels

TBR=reed@google.com

Change-Id: I14a75b7cad89aa7eb4b146a5d269856a4ad5d821
Reviewed-on: https://skia-review.googlesource.com/9646
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
2 files changed