Remove unused code

tools/utils/images/convert.go

@@ -5,7 +5,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"image"
-	"image/color"
 	"io"
 	"os"
 	"slices"
@@ -71,18 +70,6 @@ func convert_image(input io.ReadSeeker, output io.Writer, format string) (err er
 	return Encode(output, img, mt)
 }
 
-func PalettedToNRGBA(paletted *image.Paletted) *image.NRGBA {
-	bounds := paletted.Bounds()
-	nrgba := image.NewNRGBA(bounds)
-	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
-		for x := bounds.Min.X; x < bounds.Max.X; x++ {
-			c := color.NRGBAModel.Convert(paletted.At(x, y))
-			nrgba.Set(x, y, c)
-		}
-	}
-	return nrgba
-}
-
 func images_equal(img, rimg *ImageData) (err error) {
 	for i := range img.Frames {
 		a, b := img.Frames[i], rimg.Frames[i]

tools/utils/images/transforms.go

@@ -17,7 +17,7 @@ func reverse_row(bytes_per_pixel int, pix []uint8) {
 	for i < j {
 		pi := pix[i : i+bytes_per_pixel : i+bytes_per_pixel]
 		pj := pix[j : j+bytes_per_pixel : j+bytes_per_pixel]
-		for x := 0; x < bytes_per_pixel; x++ {
+		for x := range bytes_per_pixel {
 			pi[x], pj[x] = pj[x], pi[x]
 		}
 		i += bytes_per_pixel