Update ctr so it works again on windows

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

client_windows.go

@@ -7,9 +7,6 @@ import (
 	winio "github.com/Microsoft/go-winio"
 )
 
-// DefaultAddress is the default unix socket address
-const DefaultAddress = `\\.\pipe\containerd-containerd`
-
 func dialer(address string, timeout time.Duration) (net.Conn, error) {
 	return winio.DialPipe(address, &timeout)
 }