Alternate way of cleaning up inactive actors from Project 3

size_t i = 0;
    while (i < m_actors.size())
    {
        if (m_actors[i]->is_active() == false)
        {
            // First delete the actor being pointed to by m_actors[i]
            delete m_actors[i];

            // Then we erase the pointer m_actors[i] from the m_actors vector
            // Erase needs an iterator to be given as its parameter to know which element in the vector to erase
            // So we will define our iterator and set it equal to m_actors.begin() and add the element number it is in the vector
            auto itr = m_actors.begin() + i;
            // Notably the erase function actually shrinks the vector and moves all the other elements over
            // So we do not need to increase i here
            m_actors.erase(itr);
        }

        else
            i++;
    }