revert PDO exception wrapping tests

tests/Doctrine/Tests/DBAL/Functional/Driver/PDOConnectionTest.php

@@ -3,7 +3,6 @@
 namespace Doctrine\Tests\DBAL\Functional\Driver;
 
 use Doctrine\DBAL\Driver\PDOConnection;
-use Doctrine\DBAL\Driver\PDOException;
 use Doctrine\Tests\DbalFunctionalTestCase;
 
 class PDOConnectionTest extends DbalFunctionalTestCase
@@ -34,45 +33,4 @@ class PDOConnectionTest extends DbalFunctionalTestCase
     {
         $this->assertFalse($this->driverConnection->requiresQueryForServerVersion());
     }
-
-    /**
-     * @expectedException \Doctrine\DBAL\Driver\PDOException
-     */
-    public function testWrapsPDOExceptionsDuringPrepare()
-    {
-        $this->driverConnection->prepare('foo');
-    }
-
-    public function testWrapsPDOExceptionsDuringQuery()
-    {
-        $failMessage = 'Failed asserting that exception of type "\Doctrine\DBAL\Driver\PDOException" is thrown.';
-
-        try {
-            $this->driverConnection->query('foo');
-
-            $this->fail($failMessage);
-        } catch (PDOException $e) {
-        }
-
-        try {
-            $this->driverConnection->query('foo', 'bar');
-
-            $this->fail($failMessage);
-        } catch (PDOException $e) {
-        }
-
-        try {
-            $this->driverConnection->query('foo', 'bar', 'baz');
-
-            $this->fail($failMessage);
-        } catch (PDOException $e) {
-        }
-
-        try {
-            $this->driverConnection->query('foo', 'bar', 'baz', 'bloo');
-
-            $this->fail($failMessage);
-        } catch (PDOException $e) {
-        }
-    }
 }