We're gradually phasing mid_clean out (in favor of mids()).
package PublicInbox::Mbox;
use strict;
use warnings;
package PublicInbox::Mbox;
use strict;
use warnings;
-use PublicInbox::MID qw/mid_clean mid_escape/;
+use PublicInbox::MID qw/mid_escape/;
use PublicInbox::Hval qw/to_filename/;
use Email::Simple;
use Email::MIME::Encode;
use PublicInbox::Hval qw/to_filename/;
use Email::Simple;
use Email::MIME::Encode;