Move OptionManager from Common/Manager to Manager (#428)

src/Spout/Writer/Common/Manager/OptionsManagerInterface.php

@@ -1,25 +0,0 @@
-<?php
-
-namespace Box\Spout\Writer\Common\Manager;
-
-/**
- * Interface OptionsManagerInterface
- * Writer' options interface
- *
- * @package Box\Spout\Writer\Common\Manager
- */
-interface OptionsManagerInterface
-{
-    /**
-     * @param string $optionName
-     * @param mixed $optionValue
-     * @return void
-     */
-    public function setOption($optionName, $optionValue);
-
-    /**
-     * @param string $optionName
-     * @return mixed|null The set option or NULL if no option with given name found
-     */
-    public function getOption($optionName);
-}