Reverting an earlier supervisor change on debian.

Our debian and rpm start/stop scripts differ in that the rpm one uses
a separate instance of supervisor, while the debian one uses the main
instance. Thus the unix socket used by the debian supervisor is
configured it /etc/supervisor/supervisor.conf.

packaging/datadog-agent/deb/supervisor.conf

@@ -1,12 +1,3 @@
-[supervisorctl]
-serverurl = unix:///var/tmp/datadog-supervisor.sock
-
-[unix_http_server]
-file=/var/tmp/datadog-supervisor.sock
-
-[rpcinterface:supervisor]
-supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
-
 [program:collector]
 command=/usr/bin/dd-agent foreground --use-local-forwarder
 stdout_logfile=NONE