build: move pylint config into pyproject.toml

Author: nedbat

MANIFEST.in

@@ -23,7 +23,6 @@ include __main__.py
 include howto.txt
 include igor.py
 include metacov.ini
-include pylintrc
 include setup.py
 include tox.ini
 

coverage/html.py

@@ -12,7 +12,7 @@
 import os
 import re
 import shutil
-import string  # pylint: disable=deprecated-module
+import string
 
 from dataclasses import dataclass
 from typing import Any, Dict, Iterable, List, Optional, Tuple, TYPE_CHECKING, cast