[INTERNAL] sap.ui.support: Removing docuindex.json reference
[INTERNAL] sap.ui.support: Removing docuindex.json reference

The problem:
sap.ui.support library does not provide docuindex.json and that is
causing failing network requests in the DemoKit.

The solution:
removing reference to docuindex.json from sap.ui.support .library file

Change-Id: I78f2f55fc35b7aabc23a377bcf72396a062f838d

cschuff/openui5,SAP/openui5,SQCLabs/openui5,SQCLabs/openui5,nzamani/openui5,SQCLabs/openui5,nzamani/openui5,SAP/openui5,SAP/openui5,nzamani/openui5,cschuff/openui5,cschuff/openui5,SAP/openui5