fix: remove LocalePresetType

iamkun/dayjs#968

Author: afc163

src/generate/dayjs.ts

@@ -35,7 +35,7 @@ const localeMap: IlocaleMapObject = {
 
 const parseLocale = (locale: string) => {
   const mapLocale = localeMap[locale];
-  return (mapLocale || locale.split('_')[0]) as LocalePresetType;
+  return mapLocale || locale.split('_')[0];
 };
 
 const parseNoMatchNotice = () => {