remove all references to legacy Config8888

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 787d89d184a3a87ddf88be1a7aa1b6556f7aa313..8549dc3075e63be9ace1ab6c6a31545803faa62d 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -667,18 +667,6 @@ SkBaseDevice* SkCanvas::setRootDevice(SkBaseDevice* device) {
     return device;
 }
 
-#ifdef SK_SUPPORT_LEGACY_READPIXELSCONFIG
-bool SkCanvas::readPixels(SkBitmap* bitmap,
-                          int x, int y,
-                          Config8888 config8888) {
-    SkBaseDevice* device = this->getDevice();
-    if (!device) {
-        return false;
-    }
-    return device->readPixels(bitmap, x, y, config8888);
-}
-#endif
-
 bool SkCanvas::readPixels(SkBitmap* bitmap, int x, int y) {
     if (kUnknown_SkColorType == bitmap->colorType() || bitmap->getTexture()) {
         return false;