imaptracker: drop {dbname} field

It's not used anywhere since the IMAPTracker object doesn't
disconnect and reconnect.  If we ever need the filename,
{dbh}->sqlite_db_filename may be used.

Cc: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/lib/PublicInbox/IMAPTracker.pm b/lib/PublicInbox/IMAPTracker.pm
index 26274568..0bbabe07 100644
--- a/lib/PublicInbox/IMAPTracker.pm
+++ b/lib/PublicInbox/IMAPTracker.pm
@@ -69,8 +69,7 @@ sub new {
                 File::Path::mkpath(File::Basename::dirname($dbname));
         }
 
-        my $dbh = dbh_new($dbname);
-        bless { dbname => $dbname, url => $url, dbh => $dbh }, $class;
+        bless { url => $url, dbh => dbh_new($dbname) }, $class;
 }
 
 1;