fix: hide the setuptools family when not using it (#657)

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

src/sp_repo_review/checks/setupcfg.py

@@ -49,5 +49,9 @@ def check(setupcfg: configparser.ConfigParser | None) -> str | None:
         return ""
 
 
-def repo_review_checks() -> dict[str, SCFG]:
+def repo_review_checks(
+    list_all: bool = True, setupcfg: configparser.ConfigParser | None = None
+) -> dict[str, SCFG]:
+    if not list_all and setupcfg is None:
+        return {}
     return {p.__name__: p() for p in SCFG.__subclasses__()}