Remove getUsername methods in tests

Author: alamirault

Tests/EventListener/PasswordMigratingListenerTest.php

@@ -175,10 +175,6 @@ public function eraseCredentials(): void
     {
     }
 
-    public function getUsername(): string
-    {
-    }
-
     public function getUserIdentifier(): string
     {
     }

Tests/Firewall/ContextListenerTest.php

@@ -552,11 +552,6 @@ public function setUser($user): void
         $this->user = $user;
     }
 
-    public function getUsername(): string
-    {
-        return $this->user->getUserIdentifier();
-    }
-
     public function getUserIdentifier(): string
     {
         return $this->getUserIdentifier();

Tests/LoginLink/LoginLinkHandlerTest.php

@@ -289,11 +289,6 @@ public function getSalt(): string
         return '';
     }
 
-    public function getUsername(): string
-    {
-        return $this->username;
-    }
-
     public function getUserIdentifier(): string
     {
         return $this->username;