Removed unused translation key

lang/en.json

@@ -30,7 +30,6 @@
         "ChooseDate": "Choose date",
         "ChooseLanguage": "Choose language",
         "ChoosePeriod": "Choose period",
-        "ChooseWebsite": "Choose website",
         "ClickHere": "Click here for more information.",
         "ClickToChangePeriod": "Click again to change the period.",
         "Close": "Close",