remove generic alltogether from SignalService, typing memes

src/async_utils/sig_service.py

@@ -33,9 +33,7 @@
 type HandleableSignals = Literal["SIGINT", "SIGTERM", "SIGBREAK", "SIGHUP"]
 type SignalTuple = tuple[HandleableSignals, ...]
 
-
-type _DEF = tuple[Literal["SIGINT"], Literal["SIGTERM"], Literal["SIGBREAK"]]
-default_handled: Final[_DEF] = "SIGINT", "SIGTERM", "SIGBREAK"
+default_handled: Final = "SIGINT", "SIGTERM", "SIGBREAK"
 
 
 class SpecialExit(enum.IntEnum):
@@ -44,15 +42,15 @@ class SpecialExit(enum.IntEnum):
     EXIT = 252
 
 
-class SignalService[T: SignalTuple]:
+class SignalService:
     """Helper for signal handling.
 
     Meant for graceful signal handling where the main thread is only used
     for signal handling.
     This should be paired with event loops being run in threads.
     """
 
-    def __init__(self, signals: T = default_handled, /) -> None:
+    def __init__(self, signals: SignalTuple = default_handled, /) -> None:
         self._startup: list[StartStopCall] = []
         self._cbs: list[SignalCallback] = []
         self._joins: list[StartStopCall] = []