Remove a duplicate ssh filter rule

files/ssh/etc/filter-syslog/ssh

@@ -57,7 +57,6 @@ sshd: /^error: PAM: User not known to the .* from (inspect|scan1)\./
 sshd: /^refused connect from (::ffff:)?171\.67\.22\.12 /
 sshd: / authentication failure; .* rhost=(scan1|inspect(2-scan)?)\.stanford/
 sshd: /^Postponed \S+ for invalid user \S+ from (::ffff:)?171\.67\.22\.12 /
-sshd: /^Postponed \S+ for \S+ from (::ffff:)?171\.67\.22\.12 /
 
 # Ignore the logged disconnect message.  (We'll still get individual
 # authentication failures from compromised systems.)