Use default value of depends

The default value is the empty list so there is no need to explictly
initialize it. Also, that's consistent with the next definition of the
next environment.

Small cleanup for consistency between tox environments.

Author: DimitriPapadopoulos

pyproject.toml

@@ -131,11 +131,11 @@ dependency_groups = ["test"]
 set_env = { PYTHONWARNDEFAULTENCODING = "1" }
 
 [tool.tox.env.lint]
-depends = []
 deps = ["pre-commit"]
 package = "skip"
 commands = [["pre-commit", "run", "-a"]]
 
 [tool.tox.env.pkg]
 deps = ["build", "flit >= 3.11"]
+package = "skip"
 commands = [["pytest", "tests/test_sdist.py", { replace = "posargs", extend = true }]]