fix(ui): remove duplicate antd import in ToolPolicies

Duplicate import was causing UI build to fail:
- Line 4: import { Select, Switch, Tooltip } from 'antd'
- Line 5: import { Select, Tooltip } from 'antd' (duplicate)

Removed the duplicate line 5.

ui/litellm-dashboard/src/components/ToolPolicies.tsx

@@ -2,7 +2,6 @@
 
 import React, { useCallback, useDeferredValue, useEffect, useState } from "react";
 import { Select, Switch, Tooltip } from "antd";
-import { Select, Tooltip } from "antd";
 import {
   Table,
   TableHead,