Revert "feat: Hinzufügen der Methode GetPublicKeyAsync zu IAuthListenHandler und IAuthSenderHandler"

This reverts commit 137ccaa563f7e7a158c8a2dec518677ff8782115.

DigitalData.Auth.Abstractions/IAuthListenHandler.cs

@@ -3,6 +3,4 @@
 public interface IAuthListenHandler
 {
     Task ReceiveKeyAsync(string name, string value);
-
-    Task<string> GetPublicKeyAsync(string issuer, string audience);
 }

DigitalData.Auth.Abstractions/IAuthSenderHandler.cs

@@ -3,6 +3,4 @@
 public interface IAuthSenderHandler
 {
     Task SendKeyAsync(string name, string key);
-
-    Task<string> GetPublicKeyAsync(string issuer, string audience);
 }