I don't know if it's been said yet but ALL of Super Mario World's SFX EXIST in the All-Stars ROM WITHOUT Super Mario World itself. So maybe it was actually intended to be included in the first release but didn't make the cut?
$11/9659 A9 00 LDA #$00 A:F303 X:000A Y:0001 P:envMXdIZC
$11/965B 8D 43 21 STA $2143 [$11:2143] A:F300 X:000A Y:0001 P:envMXdIzC
If you alter that value to anything else, you'll start hearing SFX of Super Mario World once then it'll stop playing. Just keep changing the value and it'll shuffle right through them.
Edit: Ha, I just checked The Cutting Room Floor. I should have checked that first, woops! At least there's an interesting bit of code discovered though that triggers the SFX.