[SecurityBundle] Removing an old configuration key in a test - caught by the Configuration validation.

src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/yml/container1.yml

@@ -18,7 +18,6 @@ security:
             users:
                 foo: { password: foo, roles: 'ROLE_USER, ROLE_ADMIN' }
         basic:
-            password_encoder: sha1
             users:
                 foo: { password: 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33, roles: ROLE_SUPER_ADMIN }
                 bar: { password: 0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33, roles: [ROLE_USER, ROLE_ADMIN] }