Remove unused aws access key opts

These options are unused since the compute monitor was removed by
commit 07646e8.

blueprint: scope-config-opts
Change-Id: I85af41fb385040710f830864d8ce70b743376e04

nova/config.py

@@ -62,12 +62,6 @@ global_opts = [
     cfg.StrOpt('my_ip',
                default=_get_my_ip(),
                help='ip address of this host'),
-    cfg.StrOpt('aws_access_key_id',
-               default='admin',
-               help='AWS Access ID'),
-    cfg.StrOpt('aws_secret_access_key',
-               default='admin',
-               help='AWS Access Key'),
     cfg.StrOpt('glance_host',
                default='$my_ip',
                help='default glance hostname or ip'),