Revert of Add unit repeat tiler

src/core/SkLinearBitmapPipeline_tile.h

Index: src/core/SkLinearBitmapPipeline_tile.h
diff --git a/src/core/SkLinearBitmapPipeline_tile.h b/src/core/SkLinearBitmapPipeline_tile.h
index 19bdedcfba314f87ee63efb510701db41afa36c3..60cc2a5ef09acb8eb01f4f71d1f5608ebe0484f3 100644
--- a/src/core/SkLinearBitmapPipeline_tile.h
+++ b/src/core/SkLinearBitmapPipeline_tile.h
@@ -234,79 +234,6 @@
     const Sk4s     fXsInvMax;
 };
 
-class XRepeatUnitScaleStrategy {
-public:
-    XRepeatUnitScaleStrategy(int32_t max)
-        : fXMax{SkScalar(max)}
-        , fXsMax{SkScalar(max)}
-        , fXsCap{SkScalar(nextafterf(SkScalar(max), 0.0f))}
-        , fXsInvMax{1.0f / SkScalar(max)} { }
-
-    void tileXPoints(Sk4s* xs) {
-        Sk4s divX = *xs * fXsInvMax;
-        Sk4s modX = *xs - divX.floor() * fXsMax;
-        *xs = Sk4s::Min(fXsCap, modX);
-        SkASSERT(0 <= (*xs)[0] && (*xs)[0] < fXMax);
-        SkASSERT(0 <= (*xs)[1] && (*xs)[1] < fXMax);
-        SkASSERT(0 <= (*xs)[2] && (*xs)[2] < fXMax);
-        SkASSERT(0 <= (*xs)[3] && (*xs)[3] < fXMax);
-    }
-
-    template<typename Next>
-    bool maybeProcessSpan(Span originalSpan, Next* next) {
-        SkASSERT(!originalSpan.isEmpty());
-        SkPoint start; SkScalar length; int count;
-        std::tie(start, length, count) = originalSpan;
-        // Make x and y in range on the tile.
-        SkScalar x = tile_mod(X(start), fXMax);
-        SkScalar y = Y(start);
-
-        // No need trying to go fast because the steps are larger than a tile or there is one point.
-        if (fXMax == 1 || count <= 1) {
-            return false;
-        }
-
-        // x should be on the tile.
-        SkASSERT(0.0f <= x && x < fXMax);
-        Span span({x, y}, length, count);
-
-        if (SkScalarFloorToScalar(x) != 0.0f) {
-            Span toDraw = span.breakAt(fXMax, 1.0f);
-            next->pointSpan(toDraw);
-            span.offset(-fXMax);
-        }
-
-        // All of the span could have been on the first tile. If so, then no work to do.
-        if (span.isEmpty()) return true;
-
-        // At this point the span should be aligned to zero.
-        SkASSERT(SkScalarFloorToScalar(span.startX()) == 0.0f);
-
-        SkScalar div = span.length() / fXMax;
-        int32_t repeatCount = SkScalarFloorToInt(div);
-        Span repeatableSpan{{0.0f, y}, fXMax - 1.0f, SkScalarFloorToInt(fXMax)};
-
-        // Repeat the center section.
-        next->repeatSpan(repeatableSpan, repeatCount);
-
-        // There may be some of the span left over.
-        span.breakAt(SkScalar(repeatCount) * fXMax, 1.0f);
-
-        // All on a single tile.
-        if (!span.isEmpty()) {
-            next->pointSpan(span);
-        }
-
-        return true;
-    }
-
-private:
-    const SkScalar fXMax;
-    const Sk4s     fXsMax;
-    const Sk4s     fXsCap;
-    const Sk4s     fXsInvMax;
-};
-
 class YRepeatStrategy {
 public:
     YRepeatStrategy(int32_t max)