Remove unused constants.

src/gpu/GrDistanceFieldTextContext.cpp

Index: src/gpu/GrDistanceFieldTextContext.cpp
diff --git a/src/gpu/GrDistanceFieldTextContext.cpp b/src/gpu/GrDistanceFieldTextContext.cpp
index 99aed573b609e78462349eb86f24764eba38cb95..f5983ac72358fbec10a4c6d95a85ca75a8c0be4c 100755
--- a/src/gpu/GrDistanceFieldTextContext.cpp
+++ b/src/gpu/GrDistanceFieldTextContext.cpp
@@ -38,9 +38,6 @@ static const int kMediumDFFontSize = 78;
 static const int kMediumDFFontLimit = 78;
 static const int kLargeDFFontSize = 192;
 
-static const size_t kTextVASize = 2 * sizeof(SkPoint); 
-static const size_t kTextVAColorSize = 2 * sizeof(SkPoint) + sizeof(GrColor); 
-
 static const int kVerticesPerGlyph = 4;
 static const int kIndicesPerGlyph = 6;