consolidate thread sorting in view

This is a display subroutine so it should not be in our thread
monkey-patching package, but instead in the view package.

Hopefully one day in the future, Mail::Thread will be maintained
again and we'll no longer need PublicInbox::Thread at all.

1 files changed, 0 insertions, 7 deletions

diff --git a/lib/PublicInbox/Thread.pm b/lib/PublicInbox/Thread.pm
index a3dedf54..781fffff 100644
--- a/lib/PublicInbox/Thread.pm
+++ b/lib/PublicInbox/Thread.pm
@@ -17,13 +17,6 @@ if ($Mail::Thread::VERSION <= 2.55) {
         eval q(sub _container_class { 'PublicInbox::Thread::Container' });
 }
 
-sub sort_ts {
-        sort {
-                (eval { $a->topmost->message->header('X-PI-TS') } || 0) <=>
-                (eval { $b->topmost->message->header('X-PI-TS') } || 0)
-        } @_;
-}
-
 package PublicInbox::Thread::Container;
 use strict;
 use warnings;