update

src/components/CreateStaff/CreateStaff.tsx

@@ -60,10 +60,6 @@ const CreateStaff: React.FC<formProps> = ({ combos }) => {
 
   const errors = formProps.formState.errors;
 
-  const checkDuplicates = (str1: string, str2: string, str3: string) => {
-    return str1 === str2 || str1 === str3 || str2 === str3;
-  }
-
   const onSubmit = useCallback<SubmitHandler<CreateStaffInputs>>(
     async (data) => {
       try {