remove legacy OC_Filesystem being used in a hook callback
remove legacy OC_Filesystem being used in a hook callback

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