Fix resampling actor documentation

The Raises: section is missing a ":" after the exception type, but we
just remove the documentation because assertions shouldn't be
documented, they are not intended to be caught by the users.

Instead we document that samples shouldn't be empty.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

src/frequenz/sdk/actor/resampling.py

@@ -33,15 +33,13 @@ def average(samples: Sequence[Sample], resampling_period_s: float) -> float:
     """Calculate average of the provided values.
 
     Args:
-        samples: sequences of samples to apply the average to
-        resampling_period_s: value describing how often resampling should be performed,
-            in seconds
+        samples: sequences of samples to apply the average to. It must be
+            non-empty.
+        resampling_period_s: value describing how often resampling should be
+            performed, in seconds
 
     Returns:
         average of all the sample values
-
-    Raises:
-        AssertionError if there are no provided samples
     """
     assert len(samples) > 0, "Average cannot be given an empty list of samples"
     values = list(sample.value for sample in samples if sample.value is not None)