wrapFirefox: remove (broken) sed trick

This sed trick to set argv[0] is made obsolete by c234f37, which sets
argv[0] correctly anyway.

Changed files
-1
pkgs
applications
networking
browsers
firefox
-1
pkgs/applications/networking/browsers/firefox/wrapper.nix
···
${ lib.optionalString libtrick
''
-
sed -e "s@exec @exec -a '$out/bin/${browserName}${nameSuffix}' @" -i "$out/bin/${browserName}${nameSuffix}"
libdirname="$(echo "${browser}/lib/${browserName}"*)"
libdirbasename="$(basename "$libdirname")"
mkdir -p "$out/lib/$libdirbasename"