fix daemon not compiling due to FileManager

daemon/src/FileManager.cpp

@@ -35,7 +35,7 @@ bool FileManager::openPutFile(const std::string &filename) {
 }
 
 std::pair<bool, int>
-FileManager::openGetFile(const std::__cxx11::string &filename) {
+FileManager::openGetFile(const std::string &filename) {
   this->getBaseFileName = filename;
   std::string file = this->fileDirectory;
   file.append(filename);