UserInvitations clean up (#1329)

* UserInvitations clean up

This version of Cloud Identity API wants C in customer
I commented it out in case the developers figure out that it's inconsistent with devices and groups

Delete extraneous code

* Update userinvitations.py

src/gam/gapi/cloudidentity/userinvitations.py

@@ -13,10 +13,7 @@ from gam.gapi import cloudidentity as gapi_cloudidentity
 
 def _get_customerid():
     ''' returns customer in format needed for this API'''
-    customer = GC_Values[GC_CUSTOMER_ID]
-    if customer.startswith('C'):
-        customer = customer[1:]
-    return f'customers/{customer}'
+    return f'customers/{GC_Values[GC_CUSTOMER_ID]}'
 
 def _reduce_name(name):
     ''' converts long name into email address'''
@@ -33,12 +30,9 @@ def _generic_action(action):
             'send': 'Sending'
             }
     print_action = action_map[action]
-    kwargs = {}
-    if action != 'get':
-        kwargs['body'] = {}
     print(f'{print_action} user invite...')
     result = gapi.call(svc.customers().userinvitations(), action,
-            name=name, **kwargs)
+            name=name)
     name = result.get('response', {}).get('name')
     if name:
         result['response']['name'] = _reduce_name(name)