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>

src/core/SkPath.cpp

diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index 497037a..510efd6 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -1309,14 +1309,9 @@
     // arcs from the same oval.
     auto addPt = [&forceMoveTo, this](const SkPoint& pt) {
         SkPoint lastPt;
-#ifdef SK_DISABLE_ARC_TO_LINE_TO_CHECK
-        static constexpr bool kSkipLineToCheck = true;
-#else
-        static constexpr bool kSkipLineToCheck = false;
-#endif
         if (forceMoveTo) {
             this->moveTo(pt);
-        } else if (kSkipLineToCheck || !this->getLastPt(&lastPt) ||
+        } else if (!this->getLastPt(&lastPt) ||
                    !SkScalarNearlyEqual(lastPt.fX, pt.fX) ||
                    !SkScalarNearlyEqual(lastPt.fY, pt.fY)) {
             this->lineTo(pt);

src/gpu/GrShape.cpp

diff --git a/src/gpu/GrShape.cpp b/src/gpu/GrShape.cpp
index 189b57b..4cab018 100644
--- a/src/gpu/GrShape.cpp
+++ b/src/gpu/GrShape.cpp
@@ -373,14 +373,6 @@
 
 GrShape GrShape::MakeArc(const SkRect& oval, SkScalar startAngleDegrees, SkScalar sweepAngleDegrees,
                          bool useCenter, const GrStyle& style) {
-#ifdef SK_DISABLE_ARC_TO_LINE_TO_CHECK
-    // When this flag is set the segment mask of the path won't match GrShape's segment mask for
-    // paths. Represent this shape as a path.
-    SkPath path;
-    SkPathPriv::CreateDrawArcPath(&path, oval, startAngleDegrees, sweepAngleDegrees, useCenter,
-                                  style.isSimpleFill());
-    return GrShape(path, style);
-#else
     GrShape result;
     result.changeType(Type::kArc);
     result.fArcData.fOval = oval;
@@ -391,7 +383,6 @@
     result.fStyle = style;
     result.attemptToSimplifyArc();
     return result;
-#endif
 }
 
 GrShape::GrShape(const GrShape& that) : fStyle(that.fStyle) {