remove (unused) DirectTo... methods

Change-Id: Ie5eea2902c64fc44e4e6e53b1ee3b869d430d482
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/306331
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index 29929f7..0e3e8ec 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -7,6 +7,9 @@
 Milestone 86
 ------------
 
+  * SkImage:remove DecodeToRaster, DecodeToTexture
+    https://review.skia.org/306331
+
   * Add GrContext api to update compressed backend textures.
     https://review.skia.org/302265