Cargo: drop smb2 path patch — 0.9.0 is on crates.io now

The workspace-level `[patch.crates-io] smb2 = { path = ... }` was the
sidecar for developing the FileWriter rewrite against a local smb2
worktree. With smb2 v0.9.0 published, the desktop crate resolves the
real artifact via its normal `smb2 = "0.9.0"` dep.

Author: vdavid

Cargo.lock

@@ -2,6 +2,3 @@
 members = ["apps/desktop/src-tauri", "crates/fsevent-stream", "crates/index-query"]
 exclude = ["benchmarks/smb"]
 resolver = "2"
-
-[patch.crates-io]
-smb2 = { path = "../smb2-smb-deadlock" }