fusefrontend_reverse: drop unused dirIVAttr function
fusefrontend_reverse: drop unused dirIVAttr function

This has long been replaced by virtualFile.GetAttr().

rfjakob/gocryptfs,davesteele/gocryptfs,rfjakob/gocryptfs,rfjakob/gocryptfs,davesteele/gocryptfs,davesteele/gocryptfs,rfjakob/gocryptfs