fix(sphinx): remove typing for sphinx runthrough

Author: cbrand

ext/opentelemetry-ext-prometheus/src/opentelemetry/ext/prometheus/__init__.py

@@ -123,11 +123,7 @@ def __init__(self, prefix: str = ""):
     def add_metrics_data(self, metric_records: Sequence[MetricRecord]) -> None:
         self._metrics_to_export.append(metric_records)
 
-    def collect(
-        self,
-    ) -> Iterable[
-        Union[CounterMetricFamily, SummaryMetricFamily, UnknownMetricFamily]
-    ]:
+    def collect(self):
         """Collect fetches the metrics from OpenTelemetry
         and delivers them as Prometheus Metrics.
         Collect is invoked every time a prometheus.Gatherer is run
@@ -142,11 +138,7 @@ def collect(
                 if prometheus_metric is not None:
                     yield prometheus_metric
 
-    def _translate_to_prometheus(
-        self, metric_record: MetricRecord
-    ) -> Optional[
-        Union[CounterMetricFamily, SummaryMetricFamily, UnknownMetricFamily]
-    ]:
+    def _translate_to_prometheus(self, metric_record: MetricRecord):
         prometheus_metric = None
         label_values = []
         label_keys = []