[Bug]: @babel/traverse v7.17.10 broken `this` scope with dead code elimination plugin

### 💻

- [ ] Would you like to work on a fix?

### How are you using Babel?

@babel/cli

### Input code

Reproduced in [Babel REPL](https://babel.dev/repl#?browsers=defaults%2C%20not%20ie%2011%2C%20not%20ie_mob%2011&build=&builtIns=false&corejs=3.21&spec=false&loose=false&code_lz=MYGwhgzhAEBiD28BGYBO0DeAoa1jwDsIAXVAV2GPlQAoBKTHXaYgCwEsIA6AM0RXQBeaABYATAG4muGvWiCAfI2bN2PaDTade_NNACEg4eIbYVKtqngB3aAQCmtgKKortAORaYfZGnsATdzopc2gAX2lwunoQ8KwI_CJiaB95O0c4XVpgrCA&debug=false&forceAllTransforms=true&shippedProposals=false&circleciRepo=&evaluate=false&fileSize=false&timeTravel=false&sourceType=module&lineWrap=false&presets=env&prettier=false&targets=&version=7.17.11&externalPlugins=babel-plugin-minify-dead-code-elimination%400.5.1&assumptions=%7B%7D).

### Configuration file name

_No response_

### Configuration

_No response_

### Current and expected behavior

Enabling `babel-plugin-minify-dead-code-elimination` plugin destroys `this` scope for arrow functions inside classes.

The `var _this = this` workaround should not be eliminated as it is absolutely necessary for the `this` scope to work in locally defined arrow functions.

### Environment

- Babel version v7.17.11

### Possible solution

_No response_

### Additional context

I narrowed the problem down locally to `@babel/traverse` v7.17.10. By reverting that package to v7.17.9 this problem does not occur.

Start with the Babel REPL reproduction and the babel-plugin-minify-dead-code-elimination configuration described in the issue. Compare behavior with @babel/traverse v7.17.10 and v7.17.9, focusing on arrow functions inside classes and the `var _this = this` workaround. Done means the workaround is preserved and the reproduced transformation retains the correct `this` scope.

Written by the indexing model from the issue text.