[material-ui][ClickAwayListener] Fix export of types

[illume]

Removes a tailing comma so it is compatible with older supported TypeScript versions.

Fixes #38837

The benefit is mui v5 works with older supported TypeScript versions. Important when upgrading older projects from material-ui v4.

node_modules/@mui/material/ClickAwayListener/index.d.ts:1:45 - error TS1005: ',' expected.

1 export { ClickAwayListener as default, type ClickAwayListenerProps, } from '@mui/base/ClickAwayListener';
                                              ~~~~~~~~~~~~~~~~~~~~~~

Found 1 error.

Reproducer

You can reproduce the error using TypeScript 4.4.3.

cd examples/material-ui-cra-ts

# edit package.json so typescript dependency is 4.4.3

npm install

./node_modules/.bin/tsc --version
Version 4.4.3
./node_modules/.bin/tsc
node_modules/@mui/material/ClickAwayListener/index.d.ts:1:45 - error TS1005: ',' expected.

1 export { ClickAwayListener as default, type ClickAwayListenerProps, } from '@mui/base/ClickAwayListener';
                                              ~~~~~~~~~~~~~~~~~~~~~~


Found 1 error.

• I have followed (at least) the PR section of the contributing guide.

[mui-bot]

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[mnajdova]

Thanks for the fix, I verified that it now works with TS 4.4.3.