Remove setuptools/pkg_resources (#13369)

stubs/setuptools/METADATA.toml

@@ -1,9 +1,10 @@
 version = "~=75.8.2"
 upstream_repository = "https://github.com/pypa/setuptools"
 extra_description = """\
-If using `setuptools >= 71.1` *only* for `pkg_resources`,
-you don't need `types-setuptools` since `pkg_resources` is now typed.\
+Given that `pkg_resources` is typed since `setuptools >= 71.1`, \
+it is no longer included with `types-setuptools`.
 """
+requires = ["setuptools"] # For pkg_resources
 
 [tool.stubtest]
 # darwin is equivalent to linux for OS-specific methods