Remove unused Connected

Author: guuskuiper

src/LibStored.Net/Protocol/Protocol.cs

@@ -63,11 +63,6 @@ public ProtocolLayer() { }
     /// </summary>
     public virtual void Reset() => _down?.Reset();
 
-    /// <summary>
-    /// Notifies the layer that a connection has been established.
-    /// </summary>
-    public virtual void Connected() => _up?.Connected();
-
     /// <summary>
     /// Wraps this layer around the specified upper layer, chaining the protocol stack.
     /// </summary>