Remove support for windows

node_windows.go

@@ -1,23 +0,0 @@
-package restic
-
-import "os"
-
-func (node *Node) OpenForReading() (*os.File, error) {
-	return os.Open(node.path)
-}
-
-func (node *Node) fillExtra(path string, fi os.FileInfo) error {
-	return nil
-}
-
-func (node *Node) createDevAt(path string) error {
-	return nil
-}
-
-func (node *Node) createCharDevAt(path string) error {
-	return nil
-}
-
-func (node *Node) createFifoAt(path string) error {
-	return nil
-}

snapshot_windows.go

@@ -1,16 +0,0 @@
-package restic
-
-import "os/user"
-
-func (sn *Snapshot) fillUserInfo() error {
-	usr, err := user.Current()
-	if err != nil {
-		return err
-	}
-
-	sn.Username = usr.Username
-	sn.UserID = usr.Uid
-	sn.GroupID = usr.Gid
-
-	return nil
-}