Begin removing deprecated (and now, unused) ImageFilter code paths

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 9d7a3d5c0a034f5d352ac7a07baeed9a82502d4e..a44f3933d7ddbdd7b7b6f588ec1fa45f37e633eb 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1409,7 +1409,6 @@ void SkCanvas::internalDrawDevice(SkBaseDevice* srcDev, int x, int y,
         SkImageFilter* filter = paint->getImageFilter();
         SkIPoint pos = { x - iter.getX(), y - iter.getY() };
         if (filter) {
-            SkImageFilter::DeviceProxy proxy(dstDev);
             SkIPoint offset = SkIPoint::Make(0, 0);
             const SkBitmap& srcBM = srcDev->accessBitmap(false);
             SkMatrix matrix = *iter.fMatrix;
@@ -1418,7 +1417,7 @@ void SkCanvas::internalDrawDevice(SkBaseDevice* srcDev, int x, int y,
             SkAutoTUnref<SkImageFilter::Cache> cache(dstDev->getImageFilterCache());
             SkImageFilter::Context ctx(matrix, clipBounds, cache.get());
 
-            sk_sp<SkSpecialImage> srcImg(SkSpecialImage::internal_fromBM(&proxy, srcBM,
+            sk_sp<SkSpecialImage> srcImg(SkSpecialImage::internal_fromBM(srcBM,
                                                                          &dstDev->surfaceProps()));
             if (!srcImg) {
                 continue; // something disastrous happened