[INTERNAL] sap.ui.rta: removing unused private methods in RTA
[INTERNAL] sap.ui.rta: removing unused private methods in RTA

Change-Id: I1374c54bdb032957d2b924d70fa6ab90bdd2e67b
Signed-off-by: Kevin Edinger <2cd308f6e534f22a23b481bd971d726fce0a3425@sap.com>

SAP/openui5,SAP/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5