use `std::vector` instead of `NoCopyVector`

NoCopyVector is a very limited vector type for items missing a copy constructor. This was required in the past as vector's template parameter T "must meet the requirements of CopyAssignable and CopyConstructible", however since C++11 this was weakened to "The requirements that are imposed on the elements depend on the actual operations performed on the container" which should allow use with non-CopyAssignable and non-CopyConstructible types.