Remove documentation and use of dell_switch_delegate_to

The dell_switch_delegate_to parameter was removed from the dell-switch
role in commit da75d6b734.

Change-Id: Ia70d48d417d68140ea9e3abd1409c6b0945e638c

ansible/idrac-bootstrap.yml

@@ -113,7 +113,6 @@
     # Configure bootstrap VLAN on the switch and add controller and trunk
     # interfaces to it.
     - role: dell-switch
-      dell_switch_delegate_to: localhost
       dell_switch_type: "{{ switch_type }}"
       dell_switch_provider: "{{ switch_dellos_provider }}"
       dell_switch_config:
@@ -145,7 +144,6 @@
     - name: Ensure iDRACs are (sequentially) bootstrapped
       include: idrac-bootstrap-one.yml
       vars:
-        dell_switch_delegate_to: localhost
         dell_switch_type: "{{ switch_type }}"
         dell_switch_provider: "{{ switch_dellos_provider }}"
         switch_interface_name: "{{ item.key }}"
@@ -180,7 +178,6 @@
     # Remove bootstrap VLAN from the switch and remove controller and trunk
     # interfaces from it.
     - role: dell-switch
-      dell_switch_delegate_to: localhost
       dell_switch_type: "{{ switch_type }}"
       dell_switch_provider: "{{ switch_dellos_provider }}"
       dell_switch_config:

ansible/roles/dell-switch/README.md

@@ -14,9 +14,6 @@ The switches should be configured to allow SSH access.
 Role Variables
 --------------
 
-`dell_switch_delegate_to` is the host on which to execute the `dellos` Ansible
-modules.
-
 `dell_switch_type` is the type of Dell switch. One of `dellos6`, `dellos9`.
 
 `dell_switch_provider` is authentication provider information passed as the
@@ -51,7 +48,6 @@ passwords.  It applies global configuration for LLDP, and enables two
       gather_facts: no
       roles:
         - role: dell-switch
-          dell_switch_delegate_to: localhost
           dell_switch_type: "dellos9"
           dell_switch_provider:
             host: "{{ switch_host }}"