fix(tests): drop the speculative config-entries install guard — the scoped-stub teardowns already isolate per file; full suite green both variants (completes t30 G6)

tests/entity_stublib.py

@@ -113,12 +113,6 @@ def install() -> None:
     """Register the stub modules (idempotent)."""
     if "homeassistant.components.media_player" in sys.modules:
         return
-    # honor per-file flow stub versions already in place (e.g. the
-    # config-flow/pairing/protocol files) — the hub's base would strip the
-    # base plumbing the flow tests already installed (t30 leak).
-    ce = sys.modules.get("homeassistant.config_entries")
-    if ce is not None and hasattr(ce, "OptionsFlowWithReload"):
-        return
 
     vol = types.ModuleType("voluptuous")
     vol.Required = lambda key, default=None: key