Remove bad test

The test asserts against the internal state. We should remove that

tests/Doctrine/Migrations/Tests/Configuration/ConfigurationTest.php

@@ -9,9 +9,7 @@
 use Doctrine\DBAL\Connection;
 use Doctrine\DBAL\Connections\MasterSlaveConnection;
 use Doctrine\DBAL\Driver\IBMDB2\DB2Driver;
-use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Platforms\Keywords\KeywordList;
-use Doctrine\DBAL\Schema\AbstractSchemaManager;
 use Doctrine\Migrations\Configuration\Configuration;
 use Doctrine\Migrations\DependencyFactory;
 use Doctrine\Migrations\MigrationRepository;
@@ -256,29 +254,6 @@ public function methodsThatNeedsVersionsLoaded() : array
  ];
  }
 
- public function testGetQueryWriterCreatesAnInstanceIfItWasNotConfigured() : void
- {
- $dp = $this->getMockForAbstractClass(AbstractPlatform::class, [], '', false, true, true, ['getReservedKeywordsClass']);
-
- $dp->method('getReservedKeywordsClass')
- ->willReturn(EmptyKeywordList::class);
-
- $conn = $this->getConnectionMock();
- $conn->method('getDatabasePlatform')
- ->willReturn($dp);
-
- $schemaManager = $this->createMock(AbstractSchemaManager::class);
-
- $conn->expects(self::any())
- ->method('getSchemaManager')
- ->willReturn($schemaManager);
-
- $configuration = new Configuration($conn);
- $queryWriter = $configuration->getQueryWriter();
-
- self::assertAttributeSame($configuration->getOutputWriter(), 'outputWriter', $queryWriter);
- }
-
  public function testGetQueryWriterShouldReturnTheObjectGivenOnTheConstructor() : void
  {
  $queryWriter = $this->createMock(QueryWriter::class);