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diff --git a/TODO b/TODO
index 562859a22..21f963a8c 100644
--- a/TODO
+++ b/TODO
@@ -2,7 +2,6 @@ TODO - list of things to do for libpng
 
 fix problem with C++ and EXTERN "C"
 add "grayscale->palette" transformation and "palette->grayscale" detection
-add "grayscale" -> "grayscale+alpha" and "grayscale+FILLER" transformations
 improved dithering
 multi-lingual error and warning message support
 sPLT chunk handling