chore(deps): un-patch loom dependency

Cargo.toml

@@ -13,7 +13,7 @@ default = ["std"]
 [dependencies]
 
 [dev-dependencies]
-loom = { version = "0.5", features = ["checkpoint", "futures"] }
+loom = { version = "0.5.3", features = ["checkpoint", "futures"] }
 # So that we can use `poll_fn` in tests.
 futures = "0.3"
 criterion = { version = "0.3.5", features = ["async_tokio"] }
@@ -24,10 +24,6 @@ async-std = "1"
 
 [profile.test]
 opt-level = 3
-
-[patch.crates-io]
-loom = { git = "https://github.com/tokio-rs/loom", branch = "master"}
-
 [[bench]]
 name = "sync_mpsc"
 harness = false