hotfix(slickvpn): remove unused code

internal/provider/slickvpn/updater/helpers_test.go

@@ -1,26 +0,0 @@
-package updater
-
-import (
-	"os"
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-	"golang.org/x/net/html"
-)
-
-func parseTestHTML(t *testing.T, htmlString string) *html.Node {
-	t.Helper()
-	rootNode, err := html.Parse(strings.NewReader(htmlString))
-	require.NoError(t, err)
-	return rootNode
-}
-
-func parseTestDataIndexHTML(t *testing.T) *html.Node {
-	t.Helper()
-
-	data, err := os.ReadFile("testdata/index.html")
-	require.NoError(t, err)
-
-	return parseTestHTML(t, string(data))
-}