Cleanup mostly use statements

lib/Db/AclMapper.php

@@ -23,10 +23,9 @@
 
 namespace OCA\Deck\Db;
 
-use OCA\Deck\NoPermissionException;
-use OCP\AppFramework\Db\Entity;
+
+
 use OCP\IDb;
-use OCP\AppFramework\Db\Mapper;
 
 
 class AclMapper extends DeckMapper implements IPermissionMapper {

lib/Db/Board.php

@@ -21,7 +21,6 @@
  *  
  */
 
-// db/author.php
 namespace OCA\Deck\Db;
 
 use JsonSerializable;

lib/Db/BoardMapper.php

@@ -24,8 +24,6 @@
 namespace OCA\Deck\Db;
 
 use OCP\IDb;
-use OCP\AppFramework\Db\Mapper;
-use Symfony\Component\Config\Definition\Exception\Exception;
 
 
 class BoardMapper extends DeckMapper implements IPermissionMapper {