remove double end and changes to pytest.ini

Author: Lingling Peng

pytest.ini

@@ -2,5 +2,3 @@
 python_files = test_*.py unit_test_*.py integration_test*.py
 asyncio_mode = auto
 asyncio_default_fixture_loop_scope = session
-filterwarnings =
-    ignore:::opentelemetry.*

tests/integration/conftest.py

@@ -238,4 +238,3 @@ def wrap_with_otel(request):
         finally:
             for processor in active_span_processors:
                 processor.force_flush()
-            span.end()