Remove getUsername methods in tests

Author: alamirault

Tests/Fixtures/TestLegacyPasswordAuthenticatedUser.php

@@ -41,11 +41,6 @@ public function eraseCredentials(): void
         return;
     }
 
-    public function getUsername(): string
-    {
-        return $this->username;
-    }
-
     public function getUserIdentifier(): string
     {
         return $this->username;

Tests/Hasher/PasswordHasherFactoryTest.php

@@ -199,10 +199,6 @@ public function getSalt(): ?string
     {
     }
 
-    public function getUsername(): string
-    {
-    }
-
     public function getUserIdentifier(): string
     {
     }