Always call ALPN.remove() after handshake.

Nope! The `@deprecated` tag is sufficient, and has been long since annotations were a thing.
```
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

public class Dep {
  /** @deprecated */
  public static String oldBusted;
  public static String newHotness;

  public Dep() {
  }
}
```