Outdated script in muon/muesr

[bonfus]

This line:

scriptrepository/muon/muesr/script_update.py

Line 4 in bf5ded4

print(subprocess.Popen("python -m pip install --upgrade --user https://github.com/bonfus/muesr/archive/newcif.zip",shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE,stdin=subprocess.PIPE).communicate())

references an old testing branch and should be removed. Probably the whole file is not needed since muon/muesr/install_script.py already updates muesr and mulfc if needed.