PVS-Studio warning V530 for MongoDB

void CmdLine::parseConfigFile( istream &f, stringstream &ss ) {
  ....
  f.getline(line, MAX_LINE_LENGTH);
  s = line;
  std::remove(s.begin(), s.end(), ' ');
  std::remove(s.begin(), s.end(), '\t');
  boost::to_upper(s);
  ....
}

The std::remove function does not remove elements from the container. It only shifts the elements and brings the iterator back to the beginning of the trash. Suppose we have the vector<int> container that contains elements 1,2,3,1,2,3,1,2,3. If we execute the code "remove( v.begin(), v.end(), 2 )", the container will contain elements 1,3,1,3,?,?,?, where ? is some trash. The function will bring the iterator back to the first senseless element, so if we want to remove these trash elements, we must write the code this way: "v.erase(remove(v.begin(), v.end(), 2), v.end())".

This suspicious code was found in MongoDB project by PVS-Studio static code analyzer.
Warning message is:
V530 The return value of function 'remove' is required to be utilized. cmdline.cpp 106

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/