Remove defaultMessages from the production build.

Don't run the application before active locale will be loaded

packages/app/components/i18n/IntlProvider.tsx

@@ -5,12 +5,14 @@ import i18n from 'app/services/i18n';
 import { RootState } from 'app/reducers';
 
 const IntlProvider: ComponentType = ({ children }) => {
-    const [intl, setIntl] = useState<IntlShape>(i18n.getIntl());
+    const [intl, setIntl] = useState<IntlShape>();
     const locale = useSelector(({ i18n: i18nState }: RootState) => i18nState.locale);
 
     useEffect(() => {
         if (process.env.NODE_ENV === 'test') {
             // disable async modules loading in tests
+            setIntl(i18n.getIntl());
+
             return;
         }
 
@@ -19,6 +21,11 @@ const IntlProvider: ComponentType = ({ children }) => {
         })();
     }, [locale]);
 
+    // don't run the application until locale bundle will be loaded
+    if (!intl) {
+        return null;
+    }
+
     return <RawIntlProvider value={intl}>{children}</RawIntlProvider>;
 };