fix react-toastify mounting error

src/utils/onError.js

@@ -1,16 +0,0 @@
-import { toast } from 'react-toastify';
-
-const onError = (error) => {
-  return toast.error(error.toString(), {
-    position: "top-right",
-    autoClose: false,
-    hideProgressBar: false,
-    closeOnClick: false,
-    pauseOnHover: true,
-    draggable: false,
-    progress: undefined,
-    theme: "dark",
-  });
-};
-
-export default onError;

src/utils/onSuccess.js

@@ -1,16 +0,0 @@
-import { toast } from 'react-toastify';
-
-const onSuccess = (success) => {
-  return toast.success(success.toString(), {
-    position: "top-right",
-    autoClose: 3000,
-    hideProgressBar: false,
-    closeOnClick: false,
-    pauseOnHover: false,
-    draggable: false,
-    progress: undefined,
-    theme: "dark",
-  });
-};
-
-export default onSuccess;