refactor: Remove unnecessary React import from TourButton component

Author: Creylay

DashAI/front/src/components/tour/TourButton.jsx

@@ -1,4 +1,3 @@
-import React from "react";
 import { IconButton, Tooltip } from "@mui/material";
 import HelpOutlineIcon from "@mui/icons-material/HelpOutline";
 import { useTourContext } from "./TourProvider";