bug#71852: `gvisor-tap-vsock` fails to build, complains about missing variable `remove-go-references`

[Gábor Udvari]

The remove-go-references phase was removed from the go-build-system.scm 
file in 0df957eecc536e1d0a5722b47dda1563439bbe04:

https://git.savannah.gnu.org/cgit/guix.git/commit/guix/build/go-build-system.scm?id=0df957eecc536e1d0a5722b47dda1563439bbe04