remove old cruft

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

util/fn/fn.go

@@ -1,15 +0,0 @@
-package fn
-
-type Initer interface {
-	Init(opts ...interface{}) error
-}
-
-func Init(ifaces ...Initer) error {
-	var err error
-	for _, iface := range ifaces {
-		if err = iface.Init(); err != nil {
-			return err
-		}
-	}
-	return nil
-}