[In Progress] Remove deprecated api (#4973)

* Remove deprecated api

* Revert changes to wasm-build-runner

substrate/client/network/src/protocol/specialization.rs

@@ -41,14 +41,6 @@ pub trait NetworkSpecialization<B: BlockT>: Send + Sync + 'static {
 		message: Vec<u8>
 	);
 
-	/// Called when a network-specific event arrives.
-	#[deprecated(note = "This method is never called; please use `with_dht_event_tx` when building the service")]
-	fn on_event(&mut self, _event: Event) {}
-
-	/// Called on abort.
-	#[deprecated(note = "This method is never called; aborting corresponds to dropping the object")]
-	fn on_abort(&mut self) { }
-
 	/// Called periodically to maintain peers and handle timeouts.
 	fn maintain_peers(&mut self, _ctx: &mut dyn Context<B>) { }
 
@@ -162,17 +154,6 @@ macro_rules! construct_simple_protocol {
 				$( self.$sub_protocol_name.on_message(_ctx, _who, _message); )*
 			}
 
-			fn on_event(
-				&mut self,
-				_event: $crate::specialization::Event
-			) {
-				$( self.$sub_protocol_name.on_event(_event); )*
-			}
-
-			fn on_abort(&mut self) {
-				$( self.$sub_protocol_name.on_abort(); )*
-			}
-
 			fn maintain_peers(&mut self, _ctx: &mut $crate::Context<$block>) {
 				$( self.$sub_protocol_name.maintain_peers(_ctx); )*
 			}