pkg/machine/wsl: rm unused structures

Those are not used since commit 0c587f024 ("refactor(machine,wsl):
improve operations of Windows API").

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

pkg/machine/wsl/util_windows.go

@@ -41,21 +41,6 @@ type SHELLEXECUTEINFO struct {
 	hProcess       syscall.Handle
 }
 
-type Luid struct {
-	lowPart  uint32
-	highPart int32
-}
-
-type LuidAndAttributes struct {
-	luid       Luid
-	attributes uint32
-}
-
-type TokenPrivileges struct {
-	privilegeCount uint32
-	privileges     [1]LuidAndAttributes
-}
-
 // Cleaner to refer to the official OS constant names, and consistent with syscall
 // Ref: https://learn.microsoft.com/en-us/windows/win32/api/shellapi/ns-shellapi-shellexecuteinfow#members
 const (