fix(perplexity): undo xfails (#32192)

Author: mdrxy

libs/partners/perplexity/tests/integration_tests/test_chat_models_standard.py

@@ -24,22 +24,4 @@ def test_double_messages_conversation(self, model: BaseChatModel) -> None:
     def test_stop_sequence(self, model: BaseChatModel) -> None:
         super().test_stop_sequence(model)
 
-    @pytest.mark.xfail(reason="TODO, this regressed for some reason after 2025-04-15")
-    @pytest.mark.parametrize("schema_type", ["pydantic", "typeddict", "json_schema"])
-    def test_structured_output(self, model: BaseChatModel, schema_type: str) -> None:
-        super().test_structured_output(model, schema_type)
-
-    @pytest.mark.xfail(reason="TODO, this regressed for some reason after 2025-04-15")
-    @pytest.mark.parametrize("schema_type", ["pydantic", "typeddict", "json_schema"])
-    async def test_structured_output_async(
-        self, model: BaseChatModel, schema_type: str
-    ) -> None:
-        await super().test_structured_output_async(model, schema_type)
-
-    @pytest.mark.xfail(reason="TODO, this regressed for some reason after 2025-04-15")
-    def test_structured_output_pydantic_2_v1(self, model: BaseChatModel) -> None:
-        super().test_structured_output_pydantic_2_v1(model)
-
-    @pytest.mark.xfail(reason="TODO, this regressed for some reason after 2025-04-15")
-    def test_structured_output_optional_param(self, model: BaseChatModel) -> None:
-        super().test_structured_output_optional_param(model)
+    # TODO, API regressed for some reason after 2025-04-15