Update comment about input_measures setting in metric parsing (#9118)

In [#7984](#7984)
we began setting a metrics `type_params.input_measures` during metric
processing post parsing. However in that PR we didn't clean up the comment
in the parser about setting `input_measures`. This is that post fact
cleanup.

core/dbt/parser/schema_yaml_readers.py

@@ -308,9 +308,7 @@ def _get_metric_type_params(self, type_params: UnparsedMetricTypeParams) -> Metr
             window=self._get_time_window(type_params.window),
             grain_to_date=grain_to_date,
             metrics=self._get_metric_inputs(type_params.metrics),
-            # TODO This is a compiled list of measure/numerator/denominator as
-            # well as the `input_measures` of included metrics. We're planning
-            # on doing this as part of CT-2707
+            # input measures are calculated via metric processing post parsing
             # input_measures=?,
         )