remove unused imports

src/main/java/org/cryptomator/common/recovery/RecoveryDirectory.java

@@ -1,8 +1,6 @@
 package org.cryptomator.common.recovery;
 
 import java.io.IOException;
-import java.nio.file.attribute.PosixFilePermissions;
-import java.nio.file.attribute.FileAttribute;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardCopyOption;