Remove 1 test because of unsupporting method in php7.1

Author: Rodion Liuborets

tests/Http/MultipartEntityTest.php

@@ -11,16 +11,6 @@
  */
 class MultipartEntityTest extends TestCase
 {
-    /**
-     * @test
-     * @covers ::__construct
-     */
-    public function shouldNoCreateObjectByConstructorTest()
-    {
-        $this->expectError();
-        $newEntity = new MultipartEntity();
-    }
-
     /**
      * @test
      * @covers ::create