Delete files that have already been added in the webui

[choizhang]

Description

Delete files that have already been added in the webui

Checklist

• [x] Changes tested locally
• [x] Code reviewed
• [ ] Documentation updated (if necessary)
• [ ] Unit tests added (if applicable)

Additional Notes

I didn't clear the cache, first it was a bit difficult for him, and then I also hope for a gradual forgetting process like humans. Take a look at other people's opinions

[oliverkaiser]

this seems is what I need, but do we ensure the graph gets updated? For me this would be a step towards updating knowledge with a new version of a file...

[zcfrank1st]

any update?