remove dead SK_SUPPORT_LEGACY_IMAGEDECODER_CHOOSER code

src/images/SkImageDecoder_libgif.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColor.h"
 #include "SkColorPriv.h"
 #include "SkColorTable.h"
@@ skipping 292 matching lines @@
                 height = innerHeight;
                 imageTop = 0;
             } else if (imageTop + innerHeight > height) {
                 gif_warning(*bm, "shifting image up to fit");
                 imageTop = height - innerHeight;
             } else if (imageTop < 0) {
                 gif_warning(*bm, "shifting image down to fit");
                 imageTop = 0;
             }
 
-#ifdef SK_SUPPORT_LEGACY_IMAGEDECODER_CHOOSER
-            // FIXME: We could give the caller a choice of images or configs.
-            if (!this->chooseFromOneChoice(kIndex_8_SkColorType, width, height)) {
-                return error_return(*bm, "chooseFromOneChoice");
-            }
-#endif
-
             SkScaledBitmapSampler sampler(width, height, this->getSampleSize());
 
             bm->setInfo(SkImageInfo::Make(sampler.scaledWidth(), sampler.scaledHeight(),
                                           kIndex_8_SkColorType, kPremul_SkAlphaType));
 
             if (SkImageDecoder::kDecodeBounds_Mode == mode) {
                 return kSuccess;
             }
 
 
@@ skipping 198 matching lines @@
 static SkImageDecoder_DecodeReg gReg(sk_libgif_dfactory);
 
 static SkImageDecoder::Format get_format_gif(SkStreamRewindable* stream) {
     if (is_gif(stream)) {
         return SkImageDecoder::kGIF_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageDecoder_FormatReg gFormatReg(get_format_gif);