Revoke default package (DBMS_LDAP, UTL_INADDR, OWA_UTIL, DBMS_CREDENTIAL .. ) from public

Dear Sir/Madam

As external audit recommend to revoke below from public

Doe it will impact database or system?

--REVOKE EXECUTE ON .. FROM PUBLIC;

--Network packages

REVOKE EXECUTE ON DBMS_LDAP FROM PUBLIC;

REVOKE EXECUTE ON UTL_INADDR FROM PUBLIC;

REVOKE EXECUTE ON UTL_TCP FROM PUBLIC;

REVOKE EXECUTE ON UTL_SMTP FROM PUBLIC;

REVOKE EXECUTE ON UTL_HTTP FROM PUBLIC;

REVOKE EXECUTE ON HTTPURITYPE FROM PUBLIC;

-- File System packages

REVOKE EXECUTE ON DBMS_ADVISOR FROM PUBLIC;

REVOKE EXECUTE ON UTL_FILE FROM PUBLIC;

-- Encryption Packages

REVOKE EXECUTE ON DBMS_OBFUSCATION_TOOLKIT FROM PUBLIC;

REVOKE EXECUTE ON DBMS_RANDOM FROM PUBLIC;