Update form to handle No access

tests/domain/test_environments.py

@@ -34,9 +34,7 @@ def test_update_env_role():
 def test_update_env_role_no_access():
     env_role = EnvironmentRoleFactory.create(role=CSPRole.BASIC_ACCESS.value)
 
-    assert Environments.update_env_role(
-        env_role.environment, env_role.user, "No access"
-    )
+    assert Environments.update_env_role(env_role.environment, env_role.user, None)
     assert not EnvironmentRoles.get(env_role.user.id, env_role.environment.id)
 
 
@@ -84,7 +82,7 @@ def test_update_env_roles_by_environment():
         {
             "user_id": env_role_3.user.id,
             "name": env_role_3.user.full_name,
-            "role": "No access",
+            "role": None,
         },
     ]
 
@@ -119,7 +117,7 @@ def test_update_env_roles_by_member():
         {"id": dev.id, "role": CSPRole.NETWORK_ADMIN.value},
         {"id": staging.id, "role": CSPRole.BUSINESS_READ.value},
         {"id": prod.id, "role": CSPRole.TECHNICAL_READ.value},
-        {"id": testing.id, "role": "No access"},
+        {"id": testing.id, "role": None},
     ]
 
     Environments.update_env_roles_by_member(user, env_roles)