Remove unused SK_DISABLE_ARC_TO_LINE_TO_CHECK build flag Change-Id: Ibcdb8c53a95a135a8686b3fe22df5a9d32e939c7 Reviewed-on: https://skia-review.googlesource.com/126060 Reviewed-by: Robert Phillips <robertphillips@google.com> Commit-Queue: Brian Salomon <bsalomon@google.com>