Remove duplicate elements in a std::vector

std::vector::remove_duplicate.cpp

#include <algorithm>
#include <vector>
#include <set>

template <typename Type>
void remove_duplicate(std::vector<Type>& vec) {
  std::sort(vec.begin(), vec.end());
  vec.erase(unique(vec.begin(), vec.end()), vec.end());
}

template <typename Type>
void remove_duplicate2(std::vector<Type>& vec) {
  std::set<Type> s(vec.begin(), vec.end());
  vec.assign(s.begin(), s.end());
}

// See more at: http://stackoverflow.com/questions/1041620/most-efficient-way-to-erase-duplicates-and-sort-a-c-vector

I believe the arguments should be references for this to work:
change std::vector<Type> vec to std::vector<Type>& vec

Thank you @qvandenberg! Updated.