Internal server error on /chrome_frame

https://musicbrainz.org/chrome_frame

Error:

Couldn't render template "file error - main/frame.tt: not found"

Stack trace:
line 18 MusicBrainz::Server::View::Default
line 303 MusicBrainz::Server
line 295 MusicBrainz::Server
line 304 MusicBrainz::Server
line 317 MusicBrainz::Server
line 362 MusicBrainz::Server

Request data:
$VAR1 = {
'query_parameters' => {},
'body_parameters' => {}
};

URL: https://musicbrainz.org/chrome_frame

As far as I know, we removed the Chrome frame stuff and this should be a 404.