cleanup some obsolete foldersize code from the shared storage backend
cleanup some obsolete foldersize code from the shared storage backend

Ardinis/server,pixelipo/server,IljaN/core,endsguy/server,pmattern/server,bluelml/core,pollopolea/core,andreas-p/nextcloud-server,owncloud/core,pixelipo/server,pmattern/server,lrytz/core,pixelipo/server,whitekiba/server,michaelletzgus/nextcloud-server,pollopolea/core,sharidas/core,pmattern/server,sharidas/core,cernbox/core,andreas-p/nextcloud-server,nextcloud/server,whitekiba/server,lrytz/core,sharidas/core,cernbox/core,sharidas/core,IljaN/core,endsguy/server,lrytz/core,Ardinis/server,xx621998xx/server,andreas-p/nextcloud-server,endsguy/server,michaelletzgus/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,jbicha/server,pmattern/server,nextcloud/server,cernbox/core,xx621998xx/server,phil-davis/core,endsguy/server,xx621998xx/server,cernbox/core,lrytz/core,michaelletzgus/nextcloud-server,xx621998xx/server,jbicha/server,bluelml/core,pollopolea/core,jbicha/server,Ardinis/server,IljaN/core,pixelipo/server,Ardinis/server,owncloud/core,bluelml/core,pollopolea/core,pollopolea/core,pmattern/server,IljaN/core,whitekiba/server,jbicha/server,cernbox/core,nextcloud/server,sharidas/core,jbicha/server,pixelipo/server,nextcloud/server,owncloud/core,lrytz/core,michaelletzgus/nextcloud-server,bluelml/core,owncloud/core,Ardinis/server,xx621998xx/server,endsguy/server,IljaN/core,bluelml/core,owncloud/core,whitekiba/server,whitekiba/server