remove dead SK_SUPPORT_LEGACY_IMAGEDECODER_CHOOSER code

src/images/SkImageDecoder_pkm.cpp

Index: src/images/SkImageDecoder_pkm.cpp
diff --git a/src/images/SkImageDecoder_pkm.cpp b/src/images/SkImageDecoder_pkm.cpp
index 746ae40c4c287a44839ad6d22d4fa84acd402742..17ef2f3037ee0d99063cdc76d835de9ea42f4a59 100644
--- a/src/images/SkImageDecoder_pkm.cpp
+++ b/src/images/SkImageDecoder_pkm.cpp
@@ -47,13 +47,6 @@ SkImageDecoder::Result SkPKMImageDecoder::onDecode(SkStream* stream, SkBitmap* b
     const unsigned short width = etc1_pkm_get_width(buf);
     const unsigned short height = etc1_pkm_get_height(buf);
 
-#ifdef SK_SUPPORT_LEGACY_IMAGEDECODER_CHOOSER
-    // should we allow the Chooser (if present) to pick a config for us???
-    if (!this->chooseFromOneChoice(kN32_SkColorType, width, height)) {
-        return kFailure;
-    }
-#endif
-
     // Setup the sampler...
     SkScaledBitmapSampler sampler(width, height, this->getSampleSize());