Completes "Deprecate doCacheClear in Delegator interface and class and related minilang classes" https://issues.apache.org/jira/browse/OFBIZ-5325

Removes useless deprecated things in trunk


git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1647132 13f79535-47bb-0310-9956-ffa450edef68