fix(navbar.language-menu): remove sk from constants (#356)

ref:
- ovh-ux/ovh-manager-web#692
- ovh-ux/ovh-manager-dedicated#1045

Author: antleblanc

packages/manager/modules/navbar/src/language-menu/constants.js

@@ -14,7 +14,6 @@ export const LANGUAGES = [
   { value: 'nl_NL', name: 'Nederlands' },
   { value: 'pl_PL', name: 'Polski' },
   { value: 'pt_PT', name: 'Português' },
-  { value: 'sk_SK', name: 'Slovakian' },
   { value: 'fi_FI', name: 'Suomi' },
   { value: 'cs_CZ', name: 'Česky' },
 ];