Don't use .cache for coverage

Author: borntyping

tox.ini

@@ -20,7 +20,6 @@ deps=wheel
 addopts=--tb=short --cov=dice --ignore=setup.py
 
 [coverage:run]
-data_file=.cache/coverage_data
 omit =
     dice/tests/conftest.py
     dice/__main__.py
@@ -33,4 +32,3 @@ exclude_lines=
 
 [coverage:html]
 title=python-dice coverage report
-directory=.cache/coverage