pre-commit is not needed to run tests.

--- traitlets-5.16.1/pyproject.toml.orig
+++ traitlets-5.16.1/pyproject.toml
@@ -38,7 +38,6 @@
     # prefix) in https://github.com/python/mypy/pull/20929; test assertions in
     # tests/test_typing.py target that newer output, so require >=1.20.
     "mypy>=2.0; implementation_name != 'pypy'",
-    "pre-commit",
     "pytest-mock",
     "pytest>=7.0,<10.0",
 ]