Drop std::Error impl for PeerHandleError

Not sure why we ever really had this, no one really ever bounds
anything on `std::Error` and its kinda a dead type, so there's no
need for us to `impl` it for our types.

Author: TheBlueMatt

lightning/src/ln/peer_handler.rs

@@ -47,8 +47,6 @@ use core::sync::atomic::{AtomicBool, AtomicU32, AtomicI32, Ordering};
 use core::{cmp, hash, fmt, mem};
 use core::ops::Deref;
 use core::convert::Infallible;
-#[cfg(feature = "std")]
-use std::error;
 #[cfg(not(c_bindings))]
 use {
 	crate::ln::channelmanager::{SimpleArcChannelManager, SimpleRefChannelManager},
@@ -497,13 +495,6 @@ impl fmt::Display for PeerHandleError {
 	}
 }
 
-#[cfg(feature = "std")]
-impl error::Error for PeerHandleError {
-	fn description(&self) -> &str {
-		"Peer Sent Invalid Data"
-	}
-}
-
 enum InitSyncTracker{
 	NoSyncRequested,
 	ChannelsSyncing(u64),