Revert "fix: Add method to map board to file permissions"

This reverts commit cfc804a.

lib/Service/PermissionService.php

@@ -19,7 +19,6 @@
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Db\MultipleObjectsReturnedException;
 use OCP\Cache\CappedMemoryCache;
-use OCP\Constants;
 use OCP\IConfig;
 use OCP\IGroupManager;
 use OCP\IUserManager;
@@ -133,20 +132,6 @@ public function checkPermission(?IPermissionMapper $mapper, $id, int $permission
 		throw new NoPermissionException('Permission denied');
 	}
 
-	public function boardToFilePermission(array $permissions): int {
-		$result = 0;
-		foreach ($permissions as $key => $value) {
-			$result |= $value ? match ($key) {
-				Acl::PERMISSION_READ => Constants::PERMISSION_READ,
-				Acl::PERMISSION_EDIT => Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE | Constants::PERMISSION_CREATE | Constants::PERMISSION_DELETE,
-				Acl::PERMISSION_SHARE => Constants::PERMISSION_SHARE,
-				default => 0,
-			} : 0;
-		}
-
-		return $result;
-	}
-
 	/**
 	 * @param $boardId
 	 * @return bool