removing the second failregex

The second failregex was supposed to catch an error concerning an ACL denial over IPv6, but this message is no more generated by the nrpe version (v2.15) that introduced the IPv6 support, so the first failregex seems to be sufficient.

config/filter.d/nagios.conf

@@ -3,19 +3,15 @@
 # typically logged in /var/log/messages syslog
 #
 
-
 [INCLUDES]
 # Read syslog common prefixes
 before = common.conf
 
-
 [Definition]
 _daemon     = nrpe
 failregex   = ^%(__prefix_line)sHost <HOST> is not allowed to talk to us!\s*$
-            = ^%(__prefix_line)sConnection from <HOST> closed. We don't support AF_INET6 addreess family in ACL\s*$
 ignoreregex =
 
-
 # DEV Notes:
 # 
 # Author: Ivo Truxa - 2014/02/03