remove pytest-cov from tox.ini requirements
remove pytest-cov from tox.ini requirements

WoLpH/jedi,jonashaag/jedi,mfussenegger/jedi,flurischt/jedi,dwillmer/jedi,tjwei/jedi,mfussenegger/jedi,jonashaag/jedi,flurischt/jedi,WoLpH/jedi,tjwei/jedi,dwillmer/jedi