Wrong duplication detection

Using v2.24.10, when minifying something like:
```js
class myClass {

    #_var;

    get #var() {
        return this.#_var;
    }

    set #var(val) {
        this.#_var = val;
    }
}
```

The following error occurs:
```shell
ERROR: cannot minify test.js: identifier #var has already been declared on line 6 and column 9
    6:     set #var(val) {
               ^
```