superfluous imports

src/textual/app.py

@@ -7,7 +7,6 @@ import io
 import os
 import platform
 import sys
-import string
 import warnings
 from contextlib import redirect_stdout
 from pathlib import PurePath

src/textual/widget.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 from fractions import Fraction
-import string
 from typing import (
     Any,
     Awaitable,