Remove exclusions. Just be consistent.

Author: jaraco

tox.ini

@@ -86,9 +86,4 @@ rc = --rcfile="{[coverage]rcfile}"
 hang-closing = True
 jobs = 1
 max-line-length = 79
-exclude =
-    # Exclude the entire top-level __init__.py file since its only purpose is
-    # to expose the version string and to handle Python 2/3 compatibility.
-    importlib_metadata/__init__.py
-    importlib_metadata/docs/conf.py
 enable-extensions = U4