Remove Symfony v1 commands.

Mage/Task/BuiltIn/Symfony1/ClearCache.php

@@ -1,17 +0,0 @@
-<?php
-class Mage_Task_BuiltIn_Symfony1_ClearCache
-    extends Mage_Task_TaskAbstract
-{
-    public function getName()
-    {
-        return 'Symfony v1 - Clear Cache [built-in]';
-    }
-
-    public function run()
-    {
-        $command = 'symfony cc';
-        $result = $this->_runLocalCommand($command);
-
-        return $result;
-    }
-}

Mage/Task/BuiltIn/Symfony1/Migrate.php

@@ -1,17 +0,0 @@
-<?php
-class Mage_Task_BuiltIn_Symfony1_Migrate
-    extends Mage_Task_TaskAbstract
-{
-    public function getName()
-    {
-        return 'Symfony v1 - Run Migrations [built-in]';
-    }
-
-    public function run()
-    {
-        $command = 'symfony doctrine:migrate';
-        $result = $this->_runLocalCommand($command);
-
-        return $result;
-    }
-}