Fix lint

Author: bernardobelchior

packages/mui-system/src/cssVars/useCurrentColorScheme.test.js

@@ -1,7 +1,7 @@
 import * as React from 'react';
 import { expect } from 'chai';
 import { spy } from 'sinon';
-import { createRenderer, fireEvent, act, screen, reactMajor } from '@mui/internal-test-utils';
+import { createRenderer, fireEvent, act, screen } from '@mui/internal-test-utils';
 import {
   DEFAULT_MODE_STORAGE_KEY,
   DEFAULT_COLOR_SCHEME_STORAGE_KEY,