NameManager::removeEntries calls a function that does not exist

[mkoval]

I got this error when calling removeEntries on NameManager:

dart/common/detail/NameManager.h:203:21: error: too many arguments to function
      call, expected single argument '_name', have 2 arguments
  removeName(_name, false);
  ~~~~~~~~~~        ^~~~~

I checked the source code and found that removeName does indeed have the function signature:

template <class T>
bool NameManager<T>::removeName(const std::string& _name)

I suspect that we never saw this before because NameManager is a template class and removeEntries is only instantiated when first referenced.

[jslee02]

I believe this is resolved by #564.