HOW TO DELETE UNIFIED AUDIT

hi all,

i have install oracle 12c R2 on linux el7uek.x86_64.

now i want  to configure a standard audit and i have to eliminate the component of unified audit, by follow the note:

12c: How to configure Standard Auditing equivalent to 11g (Doc ID 2391922.1)

but the script fails and i still have the scructure of Unified audit:

SQL> SELECT PARAMETER, VALUE FROM V$OPTION WHERE PARAMETER = 'Unified Auditing';

PARAMETER         VALUE

--------------------       -----------

Unified Auditing     FALSE

SQL> SELECT DISTINCT POLICY_NAME FROM AUDIT_UNIFIED_ENABLED_POLICIES;

POLICY_NAME

--------------------------------------------------------------------------------

ORA_LOGON_FAILURES

ORA_SECURECONFIG

SQL> NOAUDIT POLICY ORA_LOGON_FAILURES;