Remove unused (by clients) SkUnitMapper

This reverts commit 874423a81b5bc2541c7397e6ab00d5e7c9fdaf98.

TBR=scroggo

Author: reed@google.com

Review URL: https://codereview.chromium.org/288313009

git-svn-id: http://skia.googlecode.com/svn/trunk@14842 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleVertices.cpp b/samplecode/SampleVertices.cpp
index 4c3a17e..1e568f5 100644
--- a/samplecode/SampleVertices.cpp
+++ b/samplecode/SampleVertices.cpp
@@ -47,7 +47,7 @@
                       { SkIntToScalar(size.fX), SkIntToScalar(size.fY) } };
     SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorRED };
     return SkGradientShader::CreateLinear(pts, colors, NULL,
-                    SK_ARRAY_COUNT(colors), SkShader::kMirror_TileMode, NULL);
+                    SK_ARRAY_COUNT(colors), SkShader::kMirror_TileMode);
 }
 
 class VerticesView : public SampleView {