Fix PII lab persona tests

scenarios/03-pii-row-column-cell/sql/04_test_queries.sql

@@ -6,9 +6,3 @@ ALTER SESSION SET CURRENT_SCHEMA = ADMIN;
 SELECT employee_id, first_name, last_name, email, manager, ssn, salary, phone
 FROM dds_employees
 ORDER BY employee_id;
-
-UPDATE dds_employees
-SET phone = '555-9999'
-WHERE email = ORA_END_USER_CONTEXT.username;
-
-COMMIT;