remove unused code around SK_SUPPORT_LEGACY_XFERMODE_PARAM

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4384

Change-Id: I5121acd027d935ade169ff65941f29f654a47bd0
Reviewed-on: https://skia-review.googlesource.com/4384
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/tools/debugger/SkDebugCanvas.cpp b/tools/debugger/SkDebugCanvas.cpp
index 8bdaca1..bc699fc 100644
--- a/tools/debugger/SkDebugCanvas.cpp
+++ b/tools/debugger/SkDebugCanvas.cpp
@@ -654,25 +654,15 @@
 }
 
 void SkDebugCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
-                                const SkPoint texCoords[4], SK_XFERMODE_PARAM xmode,
+                                const SkPoint texCoords[4], SkBlendMode bmode,
                                 const SkPaint& paint) {
-#ifdef SK_SUPPORT_LEGACY_XFERMODE_PARAM
-    SkBlendMode bmode = xmode ? xmode->blend() : SkBlendMode::kModulate;
-#else
-    SkBlendMode bmode = xmode;
-#endif
     this->addDrawCommand(new SkDrawPatchCommand(cubics, colors, texCoords, bmode, paint));
 }
 
 void SkDebugCanvas::onDrawVertices(VertexMode vmode, int vertexCount, const SkPoint vertices[],
                                    const SkPoint texs[], const SkColor colors[],
-                                   SK_XFERMODE_PARAM xmode, const uint16_t indices[], int indexCount,
+                                   SkBlendMode bmode, const uint16_t indices[], int indexCount,
                                    const SkPaint& paint) {
-#ifdef SK_SUPPORT_LEGACY_XFERMODE_PARAM
-    SkBlendMode bmode = xmode ? xmode->blend() : SkBlendMode::kModulate;
-#else
-    SkBlendMode bmode = xmode;
-#endif
     this->addDrawCommand(new SkDrawVerticesCommand(vmode, vertexCount, vertices,
                          texs, colors, bmode, indices, indexCount, paint));
 }