Removed unused react-hook-form import

frontend/src/components/pages/login/index.tsx

@@ -1,6 +1,5 @@
 import { useFormik } from "formik";
 import { useEffect, useState } from "react";
-import { Controller, useForm } from "react-hook-form";
 import { useNavigate } from "react-router-dom";
 import { useLoginMutation } from "../../../generated/graphql";