remove SK_SUPPORT_LEGACY_DEVICE_CONFIG code

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 5e2ff10f63b3185687eeb7d8b920dd640ac01676..7c66fa96fa742d894f8b5b6cd0585ec4a031909c 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -352,15 +352,6 @@ SK_COMPILE_ASSERT(SkShader::kLast_BitmapType == 6, shader_type_mismatch);
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifdef SK_SUPPORT_LEGACY_DEVICE_CONFIG
-SkBitmap::Config SkGpuDevice::config() const {
-    if (NULL == fRenderTarget) {
-        return SkBitmap::kNo_Config;
-    }
-    return SkColorTypeToBitmapConfig(fRenderTarget->info().colorType());
-}
-#endif
-
 void SkGpuDevice::clear(SkColor color) {
     SkIRect rect = SkIRect::MakeWH(this->width(), this->height());
     fContext->clear(&rect, SkColor2GrColor(color), true, fRenderTarget);