[Security] remove deprecated HTTP digest auth key

src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpDigestFactory.php

@@ -58,22 +58,6 @@ class HttpDigestFactory implements SecurityFactoryInterface
     public function addConfiguration(NodeDefinition $node)
     {
         $node
-            ->beforeNormalization()
-                ->ifTrue(function ($v) { return isset($v['key']); })
-                ->then(function ($v) {
-                    if (isset($v['secret'])) {
-                        throw new \LogicException('Cannot set both key and secret options for http_digest, use only secret instead.');
-                    }
-
-                    @trigger_error('http_digest.key is deprecated since version 2.8 and will be removed in 3.0. Use http_digest.secret instead.', E_USER_DEPRECATED);
-
-                    $v['secret'] = $v['key'];
-
-                    unset($v['key']);
-
-                    return $v;
-                })
-            ->end()
             ->children()
                 ->scalarNode('provider')->end()
                 ->scalarNode('realm')->defaultValue('Secured Area')->end()

src/Symfony/Component/Security/Http/EntryPoint/DigestAuthenticationEntryPoint.php

@@ -64,16 +64,6 @@ class DigestAuthenticationEntryPoint implements AuthenticationEntryPointInterfac
         return $response;
     }
 
-    /**
-     * @deprecated Since version 2.8, to be removed in 3.0. Use getSecret() instead.
-     */
-    public function getKey()
-    {
-        @trigger_error(__method__.'() is deprecated since version 2.8 and will be removed in 3.0. Use getSecret() instead.', E_USER_DEPRECATED);
-
-        return $this->getSecret();
-    }
-
     /**
      * @return string
      */

src/Symfony/Component/Security/Http/Firewall/DigestAuthenticationListener.php

@@ -78,7 +78,7 @@ class DigestAuthenticationListener implements ListenerInterface
         }
 
         try {
-            $digestAuth->validateAndDecode($this->authenticationEntryPoint->getKey(), $this->authenticationEntryPoint->getRealmName());
+            $digestAuth->validateAndDecode($this->authenticationEntryPoint->getSecret(), $this->authenticationEntryPoint->getRealmName());
         } catch (BadCredentialsException $e) {
             $this->fail($event, $request, $e);