remove GetDeviceConfig/SetDeviceConfig

src/ports/SkImageDecoder_empty.cpp

Index: src/ports/SkImageDecoder_empty.cpp
diff --git a/src/ports/SkImageDecoder_empty.cpp b/src/ports/SkImageDecoder_empty.cpp
index 74f9cc41e38bec3197927bfad6c160299ca10339..50b1d44fa8434c1bdd887ac394c8f877d128190b 100644
--- a/src/ports/SkImageDecoder_empty.cpp
+++ b/src/ports/SkImageDecoder_empty.cpp
@@ -85,12 +85,6 @@ SkBitmap::Allocator* SkImageDecoder::setAllocator(SkBitmap::Allocator*) {
 
 void SkImageDecoder::setSampleSize(int) {}
 
-SkBitmap::Config SkImageDecoder::GetDeviceConfig() {
-    return SkBitmap::kNo_Config;
-}
-
-void SkImageDecoder::SetDeviceConfig(SkBitmap::Config) {}
-
 bool SkImageDecoder::cropBitmap(SkBitmap*, SkBitmap*, int, int, int, int, int,
                     int, int) {
     return false;