Pretty much this entire fight was missing in the TV version I saw in the 80's growing up. Mostly just the two of them standing around, cut to Gyaos laying there, cut to Guiron blinking a few times, the end.
They probably edited it. A common practice for American television programming/broadcast industry to do as they felt it was too violent for kids.(Censorship Laws) They did it a lot with anime that was broadcast here too.....back in the early days of 60's-70's tv even into the 80's