Comment out mount_file config option
Comment out mount_file config option

Prevents sample config issues with external storages. Fixes #9734

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