edpm_iscsid: Minor cleanup to delete cruft

Delete files that are no longer required when deploying iscsid on
the host, and delete unused variables related to iscsid.

Author: ASBishop

roles/edpm_container_standalone/defaults/main.yml

@@ -64,4 +64,3 @@ edpm_container_standalone_volumes: "{{
   }}"
 
 edpm_deploy_identifier: ''
-edpm_iscsid_config_volume: /var/lib/config-data/ansible-generated/iscsid

roles/edpm_container_standalone/meta/argument_specs.yml

@@ -63,7 +63,3 @@ argument_specs:
         default: /etc/ipa/ca.crt
         description: Path to TLS certificate.
         type: path
-      edpm_iscsid_config_volume:
-        default: /var/lib/config-data/ansible-generated/iscsid
-        description: Path to iscsid config directory.
-        type: path