Remove incorrect doc comment about constraint argument.

This overload of drawImageRect() does not take a `constraint` argument.
The comment about constraints appears to have been mistakenly copy-
pasted from the overload above this one.

Change-Id: If0253eec5f21f73b1dffb4dbcd7567aa37e82320
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/291200
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 440d9b5..0da239e 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -1645,10 +1645,6 @@
         current CTM, so will reflect the dst rect geometry and is equivalent to
         drawRect(dst).
 
-        constraint set to kStrict_SrcRectConstraint limits SkPaint SkFilterQuality to
-        sample within image; set to kFast_SrcRectConstraint allows sampling outside to
-        improve performance.
-
         @param image       SkImage containing pixels, dimensions, and format
         @param dst         destination SkRect of image to draw to
         @param paint       SkPaint containing SkBlendMode, SkColorFilter, SkImageFilter,