#2287 removing exception that was incorrectly cherry-picked into 2.5

tests/Doctrine/Tests/DBAL/DBALExceptionTest.php

@@ -13,14 +13,6 @@ class DBALExceptionTest extends \Doctrine\Tests\DbalTestCase
         $this->assertContains('with params ["ABC", "\x80"]', $e->getMessage());
     }
 
-    public function testAvoidOverWrappingOnDriverException()
-    {
-        $driver = $this->createMock('\Doctrine\DBAL\Driver');
-        $ex = new DriverException('', $this->createMock('\Doctrine\DBAL\Driver\DriverException'));
-        $e = DBALException::driverExceptionDuringQuery($driver, $ex, '');
-        $this->assertSame($ex, $e);
-    }
-
     public function testDriverRequiredWithUrl()
     {
         $url = 'mysql://localhost';