remove compiler warnings

src/cryfs/filesystem/CryDevice.cpp

@@ -135,6 +135,7 @@ unique_ref<FsBlobRef> CryDevice::LoadBlob(const bf::path &path) {
 }
 
 void CryDevice::statfs(const bf::path &path, struct statvfs *fsstat) {
+  (void)path;
   callFsActionCallbacks();
   uint64_t numUsedBlocks = _fsBlobStore->numBlocks();
   uint64_t numFreeBlocks = _fsBlobStore->estimateSpaceForNumBlocksLeft();

src/cryfs/filesystem/CryFile.cpp

@@ -35,6 +35,7 @@ unique_ref<parallelaccessfsblobstore::FileBlobRef> CryFile::LoadBlob() const {
 }
 
 unique_ref<fspp::OpenFile> CryFile::open(int flags) const {
+  (void)flags;
   device()->callFsActionCallbacks();
   auto blob = LoadBlob();
   return make_unique_ref<CryOpenFile>(device(), parent(), std::move(blob));

src/cryfs/filesystem/CryNode.cpp

@@ -40,6 +40,7 @@ CryNode::~CryNode() {
 }
 
 void CryNode::access(int mask) const {
+  (void)mask;
   device()->callFsActionCallbacks();
   //TODO
   return;