Remove unused role management methods from streamlit tests

- Remove create_test_role() and cleanup_test_role() methods
- These methods required SECURITYADMIN privileges and were causing CI failures
- No longer needed since tests now use existing PUBLIC role

Author: sfc-gh-daniszewski

tests_integration/testing_utils/streamlit_utils.py

@@ -183,18 +183,6 @@ def assert_proper_url_is_returned(
         assert message.startswith("Streamlit successfully deployed and available under")
         assert message.endswith(create_expected_url_suffix(entity_id, session))
 
-    def create_test_role(self, role_name: str):
-        self.setup.sql_test_helper.execute_single_sql(
-            f"set user = (select current_user()); "
-            f"create role {role_name}; "
-            f"grant role {role_name} to user IDENTIFIER($USER)"
-        )
-
-    def cleanup_test_role(self, role_name: str):
-        self.setup.sql_test_helper.execute_single_sql(
-            f"DROP ROLE IF EXISTS {role_name}"
-        )
-
     def verify_grants_applied(self, entity_id: str, test_role: str):
         try:
             self.setup.sql_test_helper.execute_single_sql(f"USE ROLE {test_role}")