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>
2 files changed