Use pytest-asyncio auto mode

tests/compute/traceng/test_traceng_vm.py

@@ -16,7 +16,6 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import pytest
-import pytest_asyncio
 import asyncio
 
 from tests.utils import asyncio_patch, AsyncioMagicMock
@@ -28,7 +27,7 @@ from gns3server.compute.traceng import TraceNG
 from gns3server.compute.notification_manager import NotificationManager
 
 
-@pytest_asyncio.fixture
+@pytest.fixture
 async def manager(port_manager):
 
     m = TraceNG.instance()
@@ -36,7 +35,7 @@ async def manager(port_manager):
     return m
 
 
-@pytest_asyncio.fixture(scope="function")
+@pytest.fixture(scope="function")
 async def vm(compute_project, manager, ubridge_path):
 
     vm = TraceNGVM("test", "00010203-0405-0607-0809-0a0b0c0d0e0f", compute_project, manager)