expiry: Remove auto-expiry.

Move the logic outside and use scripting, cronjob to delete files.

Fixes #1019

pkg/fs/auto-expiry.go

@@ -1,41 +0,0 @@
-package fs
-
-import (
-	"os"
-	"time"
-)
-
-// AutoExpiryThread - auto expiry thread
-func (fs Filesystem) AutoExpiryThread(expiry time.Duration) {
-	expireFiles := func(fp string, fl os.FileInfo, err error) error {
-		if fp == fs.path {
-			return nil
-		}
-		if fl.Mode().IsRegular() || fl.Mode()&os.ModeSymlink == os.ModeSymlink {
-			if time.Now().Sub(fl.ModTime()) > expiry {
-				if err := os.Remove(fp); err != nil {
-					if os.IsNotExist(err) {
-						return nil
-					}
-					return err
-				}
-			}
-			return ErrDirNotEmpty
-		}
-		return nil
-	}
-	ticker := time.NewTicker(3 * time.Hour)
-	for {
-		select {
-		// TODO - add a way to stop the timer thread
-		case <-ticker.C:
-			err := WalkUnsorted(fs.path, expireFiles)
-			if err != nil {
-				if !os.IsNotExist(err) && err != ErrDirNotEmpty {
-					ticker.Stop()
-					return
-				}
-			}
-		}
-	}
-}