Remove unused fs dependency

[azuchi]

Remove fs@0.0.1-security from dependencies. The package was never imported anywhere in the codebase.

The fs npm package is a security placeholder published by npm to prevent typosquatting on the built-in module name. It contains no code and provides no functionality. Beyond being dead weight, it actively breaks installs behind security-scanning registries (e.g. npm.flatt.tech), which block it as a suspicious package.