remove redundant README and move BIRD plugin to network directory

plugins/bird/README

@@ -1,33 +0,0 @@
-NAME
-    bird - Munin multigraph plugin to monitor BIRD routing daemon activity
-
-APPLICABLE SYSTEMS
-    Every system with running bird
-
-CONFIGURATION
-    The plugin must run with a user or group that could connect to bird
-    control socket.
-
-    This configuration snipplet is an example with the defaults:
-
-      [bird]
-        user root
-        protocols BGP
-        socket /var/run/bird.ctl
-
-USAGE
-    Link this plugin to /etc/munin/plugins/ and restart the munin-node.
-
-MAGIC MARKERS
-      #%# family=auto
-      #%# capabilities=autoconf
-
-BUGS
-    Not known
-
-AUTHOR
-    Luben Karavelov (karavelov at mail.bg)
-
-LICENSE
-    Same as perl
-