[MIN] fix for DBMgr from upstream related to #1385
[MIN] fix for DBMgr from upstream related to #1385

- removed unused import

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