remove dead SK_SUPPORT_LEGACY_IMAGEDECODER_CHOOSER code

src/images/SkImageDecoder_ktx.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkImageDecoder.h"
 #include "SkPixelRef.h"
@@ skipping 44 matching lines @@
     }
 
     SkKTXFile ktxFile(data);
     if (!ktxFile.valid()) {
         return kFailure;
     }
 
     const unsigned short width = ktxFile.width();
     const unsigned short height = ktxFile.height();
 
-#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
-
     // Set a flag if our source is premultiplied alpha
     const SkString premulKey("KTXPremultipliedAlpha");
     const bool bSrcIsPremul = ktxFile.getValueForKey(premulKey) == SkString("True");
 
     // Setup the sampler...
     SkScaledBitmapSampler sampler(width, height, this->getSampleSize());
 
     // Determine the alpha of the bitmap...
     SkAlphaType alphaType = kOpaque_SkAlphaType;
     if (ktxFile.isRGBA8()) {
@@ skipping 246 matching lines @@
     return SkImageDecoder::kUnknown_Format;
 }
 
 SkImageEncoder* sk_libktx_efactory(SkImageEncoder::Type t) {
     return (SkImageEncoder::kKTX_Type == t) ? SkNEW(SkKTXImageEncoder) : NULL;
 }
 
 static SkImageDecoder_DecodeReg gReg(sk_libktx_dfactory);
 static SkImageDecoder_FormatReg gFormatReg(get_format_ktx);
 static SkImageEncoder_EncodeReg gEReg(sk_libktx_efactory);