remove filecheck to enable symlinks
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_7133). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update. The CI is failing, looks like it breaks imagefolder loading.

I just checked fsspec internals and maybe instead we can detect symlink by checking `islink` and `size` to make sure it's a file
```python
if info["type"] == "file" or (info.get("islink") and info["size"])
```
 hmm actually `size` doesn't seem to filter symlinked directories, we need another way Does fsspec perhaps allow resolving symlinks? Something like https://docs.python.org/3/library/pathlib.html#pathlib.Path.resolve there is `info["destination"]` in case of a symlink, so maybe


```python
if info["type"] == "file" or (info.get("islink") and info.get("destination") and os.path.isfile(info["destination"]))
``` I've added a fix which works with some temporary test files locally 

`(info["type"] == "file" or (info.get("islink") and os.path.isfile(os.path.realpath(filepath))))`
Enables streaming from local symlinks #7083 

@lhoestq