Remove old materials from 'xml' event view
Remove old materials from 'xml' event view

Also marked it as deprecated

mvidalgarcia/indico,pferreir/indico,mic4ael/indico,pferreir/indico,mvidalgarcia/indico,pferreir/indico,OmeGak/indico,indico/indico,DirkHoffmann/indico,mvidalgarcia/indico,mvidalgarcia/indico,pferreir/indico,OmeGak/indico,mic4ael/indico,indico/indico,ThiefMaster/indico,indico/indico,DirkHoffmann/indico,indico/indico,ThiefMaster/indico,DirkHoffmann/indico,OmeGak/indico,mic4ael/indico,OmeGak/indico,ThiefMaster/indico,mic4ael/indico,ThiefMaster/indico,DirkHoffmann/indico