Absolutely unneeded and would ruin everything that made the original great. The first was lightning in a bootle. A perfect combination of direction, music, acting, etc. It was a horror to make but the light at the end of the tunnel came from happy accidents (shark didn't work, so we don't see it for the first 2/3 of the movie).
A remake would lose the zeitgeist of 1970s American cinema that birthed the original and even little, but crucial factors, like Quint being on the USS Indianapolis.
There is no way to remake this movie.