PVS-Studio warning V530 for TortoiseSVN

STDMETHODIMP CShellExt::Initialize(....)
{
  ...
  ignoredprops.empty();
  for (int p=0; p<props.GetCount(); ++p)
  {
    if (props.GetItemName(p).
          compare(SVN_PROP_IGNORE)==0)
    {
      std::string st = props.GetItemValue(p);
      ignoredprops = UTF8ToWide(st.c_str());
      // remove all escape chars ('\\')
      std::remove(ignoredprops.begin(),
                  ignoredprops.end(), '\\');
      break;
    }
  }
  ...
}

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 TortoiseSVN project by PVS-Studio static code analyzer.
Warning message is:
V530 The return value of function 'empty' is required to be utilized. contextmenu.cpp 434

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