remove unnecessary and faulty validator

Author: sanderegg

services/clusters-keeper/src/simcore_service_clusters_keeper/core/settings.py

@@ -381,15 +381,6 @@ def LOG_LEVEL(self) -> LogLevel:  # noqa: N802
     def _valid_log_level(cls, value: str) -> str:
         return cls.validate_log_level(value)
 
-    @field_validator("SERVICE_TRACKING_HEARTBEAT", mode="before")
-    @classmethod
-    def _validate_interval(
-        cls, value: str | datetime.timedelta
-    ) -> int | datetime.timedelta:
-        if isinstance(value, str):
-            return int(value)
-        return value
-
 
 def get_application_settings(app: FastAPI) -> ApplicationSettings:
     return cast(ApplicationSettings, app.state.settings)