It depends from the support plan you have. Premier support Ends in January 2015.
According to this document http://www.oracle.com/us/support/library/lifetime-support-technology-069183.pdf :
As of 10gR2 (10.2) Oracle Warehouse Builder(OWB) ships as a part of the Database release. So from 10.2 onwards the lifecycle dates for OWB will be the same as for the Database release it ships with.
Oracle Database Releases
Release GA Date Premier Support Ends Extended Support Ends Sustaining Support Ends
11.2 Sep 2009 Jan 2015 Jan 2018 Indefinite