Remove duplicate lines from test

tests/app/FrontControllerTest.php

@@ -132,8 +132,6 @@ class FrontControllerTest extends PHPUnit_Framework_TestCase
     {
         $this->setConstants(false);
         $controller = FrontController::getInstance();
-        $result = $controller->execute();
-        $controller = FrontController::getInstance();
         $this->assertNull($controller->execute());
     }