Remove duplicated body.removeChild call to fix IE breakages

When you pushed [this commit](https://github.com/lgalfaso/angular-dynamic-locale/commit/ae938f29f025c517923de91b7648e3fe7e1c3fff), you removed the script tag from the page. But for the IE block, you removed the script tag twice. This causes an error in IE 9, 10 because we're trying to remove a node that doesn't exist.

It throws the error:
```
DOM Exception: NOT_FOUND_ERR (8)
```
or
```
NotFoundErrorundefined
```

---

I removed one of the `removeChild` calls and verified that this works on IE 9/10/11.