Dead code in xdg-email

c22a09fc removes almost all the logic relating to the BROWSER variable from xdg-email but one codeblock which currently is around line 455.

# if BROWSER variable is not set, check some well known browsers instead
if [ x"$BROWSER" = x"" ]; then
    BROWSER=www-browser:links2:elinks:links:lynx:w3m
    if has_display; then
        BROWSER=x-www-browser:firefox:iceweasel:seamonkey:mozilla:epiphany:konqueror:chromium-browser:google-chrome:$BROWSER
    fi
fi

It should be removed.