Revert "fs: Replace a bunch of uses of smol::fs with manual impls" (#40406)

Reverts zed-industries/zed#40172

crates/worktree_benchmarks/src/main.rs

@@ -1,54 +0,0 @@
-use std::{
-    path::Path,
-    sync::{Arc, atomic::AtomicUsize},
-};
-
-use fs::RealFs;
-use gpui::Application;
-use settings::Settings;
-use worktree::{Worktree, WorktreeSettings};
-
-fn main() {
-    let Some(worktree_root_path) = std::env::args().nth(1) else {
-        println!(
-            "Missing path to worktree root\nUsage: bench_background_scan PATH_TO_WORKTREE_ROOT"
-        );
-        return;
-    };
-    let app = Application::headless();
-
-    app.run(|cx| {
-        settings::init(cx);
-        WorktreeSettings::register(cx);
-        let fs = Arc::new(RealFs::new(None, cx.background_executor().clone()));
-
-        cx.spawn(async move |cx| {
-            let worktree = Worktree::local(
-                Path::new(&worktree_root_path),
-                true,
-                fs,
-                Arc::new(AtomicUsize::new(0)),
-                cx,
-            )
-            .await
-            .expect("Worktree initialization to succeed");
-            let did_finish_scan = worktree
-                .update(cx, |this, _| this.as_local().unwrap().scan_complete())
-                .unwrap();
-            let start = std::time::Instant::now();
-            did_finish_scan.await;
-            let elapsed = start.elapsed();
-            let (files, directories) = worktree
-                .read_with(cx, |this, _| (this.file_count(), this.dir_count()))
-                .unwrap();
-            println!(
-                "{:?} for {directories} directories and {files} files",
-                elapsed
-            );
-            cx.update(|cx| {
-                cx.quit();
-            })
-        })
-        .detach();
-    })
-}