Purge an old supervisor config

Apparently awx_supervisor.conf was still hanging around in the debian
install.   We'll make sure we won't lay that file down and bump the
supervisor migration to make sure the file is removed permanently

config/awx_supervisor.conf

@@ -1,12 +0,0 @@
-[program:awx-celeryd]
-autorestart = true
-logfile = /var/log/supervisor/awx-celeryd.log
-stopwaitsecs = 600
-log_stdout = true
-command = /usr/bin/awx-manage celeryd -B -l info --autoscale=20,2
-user = awx
-autostart = true
-directory = /var/lib/awx
-log_stderr = true
-logfile_maxbytes = 50MB
-logfile_backups = 999