chore(ping): remove deprecated items

Related https://github.com/libp2p/rust-libp2p/issues/3647.

Pull-Request: #3702.

protocols/ping/CHANGELOG.md

@@ -2,8 +2,10 @@
 
 - Raise MSRV to 1.65.
   See [PR 3715].
+- Remove deprecated items. See [PR 3702].
 
 [PR 3715]: https://github.com/libp2p/rust-libp2p/pull/3715
+[PR 3702]: https://github.com/libp2p/rust-libp2p/pull/3702
 
 ## 0.42.0
 

protocols/ping/src/handler.rs

@@ -52,9 +52,6 @@ pub struct Config {
     /// connection is deemed unhealthy, indicating to the `Swarm` that it
     /// should be closed.
     max_failures: NonZeroU32,
-    /// Whether the connection should generally be kept alive unless
-    /// `max_failures` occur.
-    keep_alive: bool,
 }
 
 impl Config {
@@ -63,7 +60,6 @@ impl Config {
     ///   * [`Config::with_interval`] 15s
     ///   * [`Config::with_timeout`] 20s
     ///   * [`Config::with_max_failures`] 1
-    ///   * [`Config::with_keep_alive`] false
     ///
     /// These settings have the following effect:
     ///
@@ -80,7 +76,6 @@ impl Config {
             timeout: Duration::from_secs(20),
             interval: Duration::from_secs(15),
             max_failures: NonZeroU32::new(1).expect("1 != 0"),
-            keep_alive: false,
         }
     }
 
@@ -102,25 +97,6 @@ impl Config {
         self.max_failures = n;
         self
     }
-
-    /// Sets whether the ping protocol itself should keep the connection alive,
-    /// apart from the maximum allowed failures.
-    ///
-    /// By default, the ping protocol itself allows the connection to be closed
-    /// at any time, i.e. in the absence of ping failures the connection lifetime
-    /// is determined by other protocol handlers.
-    ///
-    /// If the maximum number of allowed ping failures is reached, the
-    /// connection is always terminated as a result of [`ConnectionHandler::poll`]
-    /// returning an error, regardless of the keep-alive setting.
-    #[deprecated(
-        since = "0.40.0",
-        note = "Use `libp2p::swarm::behaviour::KeepAlive` if you need to keep connections alive unconditionally."
-    )]
-    pub fn with_keep_alive(mut self, b: bool) -> Self {
-        self.keep_alive = b;
-        self
-    }
 }
 
 impl Default for Config {
@@ -268,11 +244,7 @@ impl ConnectionHandler for Handler {
     fn on_behaviour_event(&mut self, _: Void) {}
 
     fn connection_keep_alive(&self) -> KeepAlive {
-        if self.config.keep_alive {
+        KeepAlive::No
-            KeepAlive::Yes
-        } else {
-            KeepAlive::No
-        }
     }
 
     fn poll(

protocols/ping/src/lib.rs

@@ -34,9 +34,6 @@
 //! The [`Behaviour`] network behaviour produces [`Event`]s, which may be consumed from the [`Swarm`]
 //! by an application, e.g. to collect statistics.
 //!
-//! > **Note**: The ping protocol does not keep otherwise idle connections alive
-//! > by default, see [`Config::with_keep_alive`] for changing this behaviour.
-//!
 //! [`Swarm`]: libp2p_swarm::Swarm
 //! [`Transport`]: libp2p_core::Transport
 
@@ -58,24 +55,6 @@ use std::{
     task::{Context, Poll},
 };
 
-#[deprecated(since = "0.39.1", note = "Use libp2p::ping::Config instead.")]
-pub type PingConfig = Config;
-
-#[deprecated(since = "0.39.1", note = "Use libp2p::ping::Event instead.")]
-pub type PingEvent = Event;
-
-#[deprecated(since = "0.39.1", note = "Use libp2p::ping::Success instead.")]
-pub type PingSuccess = Success;
-
-#[deprecated(since = "0.39.1", note = "Use libp2p::ping::Failure instead.")]
-pub type PingFailure = Failure;
-
-#[deprecated(since = "0.39.1", note = "Use libp2p::ping::Result instead.")]
-pub type PingResult = Result;
-
-#[deprecated(since = "0.39.1", note = "Use libp2p::ping::Behaviour instead.")]
-pub type Ping = Behaviour;
-
 pub use self::protocol::PROTOCOL_NAME;
 
 /// The result of an inbound or outbound ping.