tidy(ui): remove language translation strings

There's no need to do things like translate Arabic into Finnish. We never use those strings. Remove these translations entirely.

invokeai/frontend/web/public/locales/en.json

@@ -118,24 +118,7 @@
         "inpaint": "inpaint",
         "input": "Input",
         "installed": "Installed",
-        "langArabic": "العربية",
-        "langBrPortuguese": "Português do Brasil",
-        "langDutch": "Nederlands",
-        "langEnglish": "English",
-        "langFrench": "Français",
-        "langGerman": "German",
-        "langHebrew": "Hebrew",
-        "langItalian": "Italiano",
-        "langJapanese": "日本語",
-        "langKorean": "한국어",
-        "langPolish": "Polski",
-        "langPortuguese": "Português",
-        "langRussian": "Русский",
-        "langSimplifiedChinese": "简体中文",
-        "langSpanish": "Español",
         "languagePickerLabel": "Language",
-        "langUkranian": "Украї́нська",
-        "lightMode": "Light Mode",
         "linear": "Linear",
         "load": "Load",
         "loading": "Loading",