Remove deprecated codes (#5812)

Author: huangdijia

src/Server/Connection/SwooleConnection.php

@@ -82,13 +82,13 @@ public function getTrailers(): array
         return $this->trailers;
     }
 
-    public function setConnection(ConnectionInterface|Writable $connection)
+    public function setConnection(Writable $connection)
     {
         $this->connection = $connection;
         return $this;
     }
 
-    public function getConnection(): ConnectionInterface|Writable|null
+    public function getConnection(): ?Writable
     {
         return $this->connection;
     }

src/Server/ConnectionInterface.php

@@ -11,8 +11,8 @@
  */
 namespace HyperfTest\HttpMessage;
 
+use Hyperf\Engine\Http\WritableConnection;
 use Hyperf\HttpMessage\Cookie\Cookie;
-use Hyperf\HttpMessage\Server\Connection\SwooleConnection;
 use Hyperf\HttpMessage\Server\Response;
 use Mockery;
 use PHPUnit\Framework\Attributes\CoversNothing;
@@ -64,7 +64,7 @@ public function testWrite()
         $swooleResponse->shouldReceive('write')->with($content)->once()->andReturn(true);
 
         $response = $this->newResponse();
-        $response->setConnection(new SwooleConnection($swooleResponse));
+        $response->setConnection(new WritableConnection($swooleResponse));
         $status = $response->write($content);
         $this->assertTrue($status);
     }