resolve CI issues

Author: rmartin16

changes/1619.misc.rst

@@ -0,0 +1 @@
+CHange note.

src/briefcase/commands/base.py

@@ -19,8 +19,6 @@
 from cookiecutter.repository import is_repo_url
 from platformdirs import PlatformDirs
 
-import time   # unused import to fail pre-commit
-
 if sys.version_info >= (3, 11):  # pragma: no-cover-if-lt-py311
     import tomllib
 else:  # pragma: no-cover-if-gte-py311