Revert "[rocky] Define keystone domain for heat stack"

The keystone client doesn't work fully with domains yet.
Get back when it is resolved

Related-Prod: PROD-26573

This reverts commit 6547d4d3a7e16565f40536bb34c0d1339b363cdb.

Change-Id: I1a6b98793587b65633c8d5c56f7f60c9228c1fb4
diff --git a/keystone/client/v3/service/heat.yml b/keystone/client/v3/service/heat.yml
index eb63e5f..a1b248f 100644
--- a/keystone/client/v3/service/heat.yml
+++ b/keystone/client/v3/service/heat.yml
@@ -5,9 +5,6 @@
     client:
       resources:
         v3:
-          domains:
-            heat_user_domain:
-              description: 'Contains users and projects created by heat'
           roles:
             heat_stack_user:
               name: heat_stack_user
@@ -23,14 +20,6 @@
                 service_admin:
                   name: admin
                   project_id: service
-            heat_domain_admin:
-              password: ${_param:heat_domain_admin_password}
-              email: ${_param:admin_email}
-              roles:
-                heat_stack_admin:
-                  name: admin
-                  role_domain_id: heat_user_domain
-                  domain_id: heat_user_domain
           services:
             heat:
               type: orchestration