Remove remaining traces of darglint (#873)

We moved to `pydoclint` for docstring linting a while ago so we no
longer need the `.darglint` file or darglint-related comments.

Author: llucax

.darglint

@@ -141,8 +141,6 @@ async def stop(self, msg: str | None = None) -> None:
         Raises:
             BaseExceptionGroup: If any of the tasks spawned by this service raised an
                 exception.
-
-        [//]: # (# noqa: DAR401 rest)
         """
         if not self._tasks:
             return

src/frequenz/sdk/actor/_background_service.py

@@ -374,24 +374,15 @@ def count_covered(self) -> int:
 
     @overload
     def __getitem__(self, key: SupportsIndex) -> float:
-        """See the main __getitem__ method.
-
-        [//]: # (# noqa: DAR101 key)
-        """
+        """See the main __getitem__ method."""
 
     @overload
     def __getitem__(self, key: datetime) -> float:
-        """See the main __getitem__ method.
-
-        [//]: # (# noqa: DAR101 key)
-        """
+        """See the main __getitem__ method."""
 
     @overload
     def __getitem__(self, key: slice) -> ArrayLike:
-        """See the main __getitem__ method.
-
-        [//]: # (# noqa: DAR101 key)
-        """
+        """See the main __getitem__ method."""
 
     def __getitem__(self, key: SupportsIndex | datetime | slice) -> float | ArrayLike:
         """

src/frequenz/sdk/timeseries/_moving_window.py

@@ -821,8 +821,6 @@ async def resample(self, timestamp: datetime) -> None:
 
                 If the error is in the sink, the receiving part will continue
                 working while this helper is alive.
-
-        [//]: # (# noqa: DAR401 recv_exception)
         """
         if self._receiving_task.done():
             if recv_exception := self._receiving_task.exception():