client: Remove unused fs dependency (zed-industries#18324)

CI bot notified me about that in
zed-industries#18323


Release Notes:

- N/A

Author: mrnugget

Cargo.lock

@@ -23,7 +23,6 @@ chrono = { workspace = true, features = ["serde"] }
 clock.workspace = true
 collections.workspace = true
 feature_flags.workspace = true
-fs.workspace = true
 futures.workspace = true
 gpui.workspace = true
 http_client.workspace = true