chore: Remove parking_lot deadlock_detection feature

We were using up a dedicated thread just for this and we know we have
limited resources on the phone. We should add this code locally if we
ever suspect there is a problem with deadlocks.

coordinator/Cargo.toml

@@ -77,7 +77,6 @@ path = "../crates/orderbook-commons"
 
 [dependencies.parking_lot]
 version = "0.12.1"
-features = ["deadlock_detection"]
 
 [dependencies.rust_decimal]
 version = "1"

crates/ln-dlc-node/Cargo.toml

@@ -30,7 +30,7 @@ lightning-persister = { version = "0.0.114" }
 lightning-transaction-sync = { version = "0.0.114", features = ["esplora-blocking"] }
 log = "0.4.17"
 p2pd-oracle-client = { version = "0.1.0" }
-parking_lot = { version = "0.12.1", features = ["deadlock_detection"] }
+parking_lot = { version = "0.12.1" }
 rand = "0.8.5"
 reqwest = { version = "0.11", default-features = false, features = ["json"] }
 rust-bitcoin-coin-selection = { version = "0.1.0", features = ["rand"] }

crates/ln-dlc-node/src/node/mod.rs

@@ -486,8 +486,6 @@ where
             self.keys_manager.clone(),
         ));
 
-        std::thread::spawn(monitor_for_deadlocks());
-
         tracing::info!("Lightning node started with node ID {}", self.info);
 
         Ok(RunningNode { _handles: handles })
@@ -573,25 +571,6 @@ fn spawn_background_processor(
     remote_handle
 }
 
-/// Parking lot mutexes have the ability to mark deadlocks.
-///
-/// Take advantage of this behaviour and log deadlocks when they occur.
-fn monitor_for_deadlocks() -> impl Fn() {
-    move || loop {
-        let deadlocks = parking_lot::deadlock::check_deadlock();
-
-        for (i, threads) in deadlocks.iter().enumerate() {
-            tracing::error!(%i, "Deadlock detected");
-            for t in threads {
-                tracing::error!(thread_id = %t.thread_id());
-                tracing::error!("{:#?}", t.backtrace());
-            }
-        }
-
-        std::thread::sleep(Duration::from_secs(10));
-    }
-}
-
 async fn lightning_wallet_sync(
     channel_manager: Arc<ChannelManager>,
     chain_monitor: Arc<ChainMonitor>,

mobile/native/Cargo.toml

@@ -26,7 +26,7 @@ ln-dlc-node = { path = "../../crates/ln-dlc-node" }
 openssl = { version = "0.10.55", features = ["vendored"] }
 orderbook-client = { path = "../../crates/orderbook-client" }
 orderbook-commons = { path = "../../crates/orderbook-commons" }
-parking_lot = { version = "0.12.1", features = ["deadlock_detection"] }
+parking_lot = { version = "0.12.1" }
 reqwest = { version = "0.11", default-features = false, features = ["json"] }
 rust_decimal = { version = "1", features = ["serde-with-float"] }
 serde = { version = "1.0.152", features = ["serde_derive"] }