Remove unused function (#24158)

frontend/src/metabase/lib/i18n.js

@@ -100,13 +100,6 @@ function mapToMomentLocale(locale = "") {
   }
 }
 
-// Format a fixed timestamp in local time to see if the current locale defaults
-// to using a 24 hour clock.
-export function isLocale24Hour() {
-  const formattedTime = moment("2000-01-01T13:00:00").format("LT");
-  return /^13:/.test(formattedTime);
-}
-
 // we delete msgid property since it's redundant, but have to add it back in to
 // make ttag happy
 function addMsgIds(translationsObject) {

frontend/test/metabase/lib/i18n.unit.spec.js

-import moment from "moment-timezone";
-
-import { isLocale24Hour } from "metabase/lib/i18n";
-
-describe("isLocale24Hour", () => {
-  const testCases = [
-    ["en", false],
-    ["en-us", false],
-    ["en-gb", true],
-    ["fr", true],
-    ["zh-cn", true],
-  ];
-  for (const [locale, is24] of testCases) {
-    it(`should return ${is24} for '${locale}'`, () => {
-      // save locale before changing it
-      const startingLocale = moment.locale();
-
-      moment.locale(locale);
-      expect(isLocale24Hour()).toBe(is24);
-
-      // reset locale
-      moment.locale(startingLocale);
-    });
-  }
-});