Apply repo-review suggestion RF003

RF003: src directory doesn't need to be specified anymore (0.6+)

Ruff now (0.6+) looks in the src directory by default. The src
setting doesn't need to be specified if it's just set to `["src"]`.

Author: DimitriPapadopoulos

pyproject.toml

@@ -153,7 +153,6 @@ distlib = "https://bitbucket.org/pypa/distlib/raw/master/LICENSE.txt"
 [tool.ruff]
 # Pinned to delay pyupgrade changes (https://github.com/pypa/pip/issues/13236)
 target-version = "py38"  # Pin Ruff to Python 3.8
-src = ["src"]
 line-length = 88
 extend-exclude = [
     "_vendor",