Merge pull request #36 from redthor/fix/remove-unused-migration-attributes

Remove unused abstract migration attributes, resolves #35

Author: caciobanu

src/AntiMattr/MongoDB/Migrations/AbstractMigration.php

@@ -32,16 +32,6 @@ abstract class AbstractMigration
      */
     private $outputWriter;
 
-    /**
-     * @var Doctrine\MongoDB\Connection
-     */
-    protected $connection;
-
-    /**
-     * @var Doctrine\MongoDB\Database
-     */
-    protected $db;
-
     /**
      * @var AntiMattr\MongoDB\Migrations\Version
      */
@@ -51,10 +41,6 @@ public function __construct(Version $version)
     {
         $this->configuration = $version->getConfiguration();
         $this->outputWriter = $this->configuration->getOutputWriter();
-        $this->connection = $this->configuration->getConnection();
-        $this->connection = $this->connection->selectDatabase(
-            $this->configuration->getMigrationsDatabaseName()
-        );
         $this->version = $version;
     }