fix(core): remove extra cs_CZ language from constant file (#1137)

Author: antleblanc

packages/manager/modules/core/src/manager-core.constants.js

@@ -32,9 +32,6 @@ export const LANGUAGES = {
   }, {
     name: 'Suomi',
     key: 'fi_FI',
-  }, {
-    name: 'Česky',
-    key: 'cs_CZ',
   }],
   defaultLoc: 'fr_FR',
   fallback: 'fr_FR',