[aur-general] Rename/Remove of aur sympy git package

The old python-sympy-git package is actually a python2 package, I have just adopted it and uploaded a python2-sympy-git to replace the old one. Please remove python3-sympy-git (which is my package uploaded before I adopted python-...) and possibly swap the vote of python-sympy-git and python2-sympy-git (also swap contributor if possible ~~~~) THX links to relative packages: https://aur.archlinux.org/packages.php?ID=56954 https://aur.archlinux.org/packages.php?ID=23341 https://aur.archlinux.org/packages.php?ID=56921