remove dead SK_SUPPORT_LEGACY_N32_NAME code

include/core/SkImageInfo.h

Index: include/core/SkImageInfo.h
diff --git a/include/core/SkImageInfo.h b/include/core/SkImageInfo.h
index a9d5aeac988e9c63253e9f4338e14459793188e1..341ec143a2273e22fdc10fdf359c0098b326d114 100644
--- a/include/core/SkImageInfo.h
+++ b/include/core/SkImageInfo.h
@@ -89,11 +89,7 @@ enum 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
 };