I believe that alteration was originally made on the DVD release, if I remember correctly.Originally Posted by Worth /t/318936/paramount-announces-indiana-jones-blu-ray-collection-fall-2012/30#post_3902452
I had a chance to see the new 4K restoration of Raiders a little while ago - if it's any indication as to what the blu-ray will look like, everyone should be very pleased.
Unlike the Star Wars films, there's only one minor change from the original version - they did erase the reflection of the cobra in the glass when Indy falls into the Well of Souls.