remove unnecessary ->header_obj calls

We used ->header_obj in the past as an optimization with
Email::MIME.  That optimization is no longer necessary
with PublicInbox::Eml.

This doesn't make any functional difference even if we were to
go back to Email::MIME.  However, it reduces the amount of code
we have and slightly reduces allocations with PublicInbox::Eml.

1 files changed, 4 insertions, 5 deletions

diff --git a/lib/PublicInbox/OverIdx.pm b/lib/PublicInbox/OverIdx.pm
index 5821c562..c8f61e01 100644
--- a/lib/PublicInbox/OverIdx.pm
+++ b/lib/PublicInbox/OverIdx.pm
@@ -271,11 +271,10 @@ sub subject_path ($) {
 }
 
 sub add_overview {
-        my ($self, $mime, $smsg) = @_;
-        $smsg->{lines} = $mime->body_raw =~ tr!\n!\n!;
-        my $hdr = $mime->header_obj;
-        my $mids = mids_for_index($hdr);
-        my $refs = parse_references($smsg, $hdr, $mids);
+        my ($self, $eml, $smsg) = @_;
+        $smsg->{lines} = $eml->body_raw =~ tr!\n!\n!;
+        my $mids = mids_for_index($eml);
+        my $refs = parse_references($smsg, $eml, $mids);
         my $subj = $smsg->{subject};
         my $xpath;
         if ($subj ne '') {