Remove tool.ruff.target_version (#268)

Author: edgarrmondragon

pyproject.toml

@@ -68,7 +68,6 @@ build.targets.sdist.include = [
 version.source = "vcs"
 
 [tool.ruff]
-target-version = "py39"
 line-length = 120
 format.preview = true
 format.docstring-code-line-length = 100