remove dead SK_SUPPORT_LEGACY_N32_NAME code

include/core/SkImageInfo.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageInfo_DEFINED
 #define SkImageInfo_DEFINED
 
@@ skipping 71 matching lines @@
     kBGRA_8888_SkColorType,
     kIndex_8_SkColorType,
 
     kLastEnum_SkColorType = kIndex_8_SkColorType,
 
 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
     kN32_SkColorType = kBGRA_8888_SkColorType,
 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
     kN32_SkColorType = kRGBA_8888_SkColorType,
 #else
-#error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order"
-#endif
-
-#ifdef SK_SUPPORT_LEGACY_N32_NAME
-    kPMColor_SkColorType = kN32_SkColorType
+    #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order"
 #endif
 };
 
 static int SkColorTypeBytesPerPixel(SkColorType ct) {
     static const uint8_t gSize[] = {
         0,  // Unknown
         1,  // Alpha_8
         2,  // RGB_565
         2,  // ARGB_4444
         4,  // RGBA_8888
@@ skipping 195 matching lines @@
         , fHeight(height)
         , fColorType(ct)
         , fAlphaType(at)
         , fProfileType(pt)
     {}
 
     SkColorProfileType  fProfileType;
 };
 
 #endif